<?php

namespace GetId3\Module\AudioVideo;

use GetId3\Handler\BaseHandler;
use GetId3\Lib\Helper;
use GetId3\GetId3Core;
use GetId3\Module\Tag\Id3v2;
use GetId3\Module\Audio\Mp3;
use GetId3\Module\Audio\Ac3;

/////////////////////////////////////////////////////////////////
/// GetId3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.riff.php                                 //
// module for analyzing RIFF files                             //
// multiple formats supported by this module:                  //
//    Wave, AVI, AIFF/AIFC, (MP3,AC3)/RIFF, Wavpack v3, 8SVX   //
// dependencies: module.audio.mp3.php                          //
//               module.audio.ac3.php (optional)               //
//               module.audio.dts.php (optional)               //
//                                                            ///
/////////////////////////////////////////////////////////////////

/**
 * module for analyzing RIFF files
 * multiple formats supported by this module
 * Wave, AVI, AIFF/AIFC, (MP3,AC3)/RIFF, Wavpack v3, 8SVX
 *
 * @author James Heinrich <info@getid3.org>
 *
 * @link http://getid3.sourceforge.net
 * @link http://www.getid3.org
 *
 * @uses GetId3\Module\Audio\Mp3
 * @uses GetId3\Module\Audio\Ac3 (optional)
 * @uses GetId3\Module\Audio\Dts (optional)
 */
class Riff extends BaseHandler
{
    /**
     * @return bool
     */
    public function analyze()
    {
        $info = &$this->getid3->info;

        // initialize these values to an empty array, otherwise they default to NULL
        // and you can't append array values to a NULL value
        $info['riff'] = array('raw' => array());

        // Shortcuts
        $thisfile_riff = &$info['riff'];
        $thisfile_riff_raw = &$thisfile_riff['raw'];
        $thisfile_audio = &$info['audio'];
        $thisfile_video = &$info['video'];
        $thisfile_audio_dataformat = &$thisfile_audio['dataformat'];
        $thisfile_riff_audio = &$thisfile_riff['audio'];
        $thisfile_riff_video = &$thisfile_riff['video'];

        $Original['avdataoffset'] = $info['avdataoffset'];
        $Original['avdataend'] = $info['avdataend'];

        fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
        $RIFFheader = fread($this->getid3->fp, 12);
        $RIFFsubtype = substr($RIFFheader, 8, 4);
        switch (substr($RIFFheader, 0, 4)) {
            case 'FORM':
                $info['fileformat'] = 'aiff';
                $thisfile_riff['header_size'] = $this->EitherEndian2Int(substr($RIFFheader, 4, 4));
                $thisfile_riff[$RIFFsubtype] = $this->ParseRIFF($info['avdataoffset'] + 12, $info['avdataoffset'] + $thisfile_riff['header_size']);
                break;

            case 'RIFF':  // AVI, WAV, etc
            case 'SDSS':  // SDSS is identical to RIFF, just renamed. Used by SmartSound QuickTracks (www.smartsound.com)
            case 'RMP3':  // RMP3 is identical to RIFF, just renamed. Used by [unknown program] when creating RIFF-MP3s
                $info['fileformat'] = 'riff';
                $thisfile_riff['header_size'] = $this->EitherEndian2Int(substr($RIFFheader, 4, 4));
                if ($RIFFsubtype == 'RMP3') {
                    // RMP3 is identical to WAVE, just renamed. Used by [unknown program] when creating RIFF-MP3s
                    $RIFFsubtype = 'WAVE';
                }
                $thisfile_riff[$RIFFsubtype] = $this->ParseRIFF($info['avdataoffset'] + 12, $info['avdataoffset'] + $thisfile_riff['header_size']);
                if (($info['avdataend'] - $info['filesize']) == 1) {
                    // LiteWave appears to incorrectly *not* pad actual output file
                    // to nearest WORD boundary so may appear to be short by one
                    // byte, in which case - skip warning
                    $info['avdataend'] = $info['filesize'];
                }

                $nextRIFFoffset = $Original['avdataoffset'] + 8 + $thisfile_riff['header_size']; // 8 = "RIFF" + 32-bit offset
                while ($nextRIFFoffset < min($info['filesize'], $info['avdataend'])) {
                    if (!Helper::intValueSupported($nextRIFFoffset + 1024)) {
                        $info['error'][] = 'AVI extends beyond '.round(PHP_INT_MAX / 1073741824).'GB and PHP filesystem functions cannot read that far, playtime is probably wrong';
                        $info['warning'][] = '[avdataend] value may be incorrect, multiple AVIX chunks may be present';
                        break;
                    } else {
                        fseek($this->getid3->fp, $nextRIFFoffset, SEEK_SET);
                        $nextRIFFheader = fread($this->getid3->fp, 12);
                        if ($nextRIFFoffset == ($info['avdataend'] - 1)) {
                            if (substr($nextRIFFheader, 0, 1) == "\x00") {
                                // RIFF padded to WORD boundary, we're actually already at the end
                                break;
                            }
                        }
                        $nextRIFFheaderID = substr($nextRIFFheader, 0, 4);
                        $nextRIFFsize = $this->EitherEndian2Int(substr($nextRIFFheader, 4, 4));
                        $nextRIFFtype = substr($nextRIFFheader, 8, 4);
                        $chunkdata = array();
                        $chunkdata['offset'] = $nextRIFFoffset + 8;
                        $chunkdata['size'] = $nextRIFFsize;
                        $nextRIFFoffset = $chunkdata['offset'] + $chunkdata['size'];
                        switch ($nextRIFFheaderID) {
                            case 'RIFF':
                                $info['avdataend'] = $nextRIFFoffset;
                                if (!Helper::intValueSupported($info['avdataend'])) {
                                    $info['error'][] = 'AVI extends beyond '.round(PHP_INT_MAX / 1073741824).'GB and PHP filesystem functions cannot read that far, playtime is probably wrong';
                                    $info['warning'][] = '[avdataend] value may be incorrect, multiple AVIX chunks may be present';
                                }
                                $chunkdata['chunks'] = $this->ParseRIFF($chunkdata['offset'] + 4, $chunkdata['offset'] + $chunkdata['size']);

                                if (!isset($thisfile_riff[$nextRIFFtype])) {
                                    $thisfile_riff[$nextRIFFtype] = array();
                                }
                                $thisfile_riff[$nextRIFFtype][] = $chunkdata;
                                break;
                            case 'JUNK':
                                // ignore
                                $thisfile_riff[$nextRIFFheaderID][] = $chunkdata;
                                break;
                            default:
                                if ($info['filesize'] == ($chunkdata['offset'] - 8 + 128)) {
                                    $DIVXTAG = $nextRIFFheader.fread($this->getid3->fp, 128 - 12);
                                    if (substr($DIVXTAG, -7) == 'DIVXTAG') {
                                        // DIVXTAG is supposed to be inside an IDVX chunk in a LIST chunk, but some bad encoders just slap it on the end of a file
                                        $info['warning'][] = 'Found wrongly-structured DIVXTAG at offset '.(ftell($this->getid3->fp) - 128 + 12).', parsing anyway';
                                        $thisfile_riff['DIVXTAG'] = $this->ParseDIVXTAG($DIVXTAG);
                                        foreach ($thisfile_riff['DIVXTAG'] as $key => $value) {
                                            if ($value && !preg_match('#_id$#', $key)) {
                                                $thisfile_riff['comments'][$key][] = $value;
                                            }
                                        }
                                        break 2;
                                    }
                                }
                                $info['warning'][] = 'expecting "RIFF" or "JUNK" at '.$nextRIFFoffset.', found '.Helper::PrintHexBytes(substr($nextRIFFheader, 0, 4)).' - skipping rest of file';
                                break 2;
                        }
                    }
                }
                if ($RIFFsubtype == 'WAVE') {
                    $thisfile_riff_WAVE = &$thisfile_riff['WAVE'];
                }
                break;

            default:
                $info['error'][] = 'Cannot parse RIFF (this is maybe not a RIFF / WAV / AVI file?) - expecting "FORM|RIFF|SDSS|RMP3" found "'.$RIFFsubtype.'" instead';
                unset($info['fileformat']);

                return false;
                break;
        }

        $streamindex = 0;
        switch ($RIFFsubtype) {
            case 'WAVE':
                if (empty($thisfile_audio['bitrate_mode'])) {
                    $thisfile_audio['bitrate_mode'] = 'cbr';
                }
                if (empty($thisfile_audio_dataformat)) {
                    $thisfile_audio_dataformat = 'wav';
                }

                if (isset($thisfile_riff_WAVE['data'][0]['offset'])) {
                    $info['avdataoffset'] = $thisfile_riff_WAVE['data'][0]['offset'] + 8;
                    $info['avdataend'] = $info['avdataoffset'] + $thisfile_riff_WAVE['data'][0]['size'];
                }
                if (isset($thisfile_riff_WAVE['fmt '][0]['data'])) {
                    $thisfile_riff_audio[$streamindex] = self::RIFFparseWAVEFORMATex($thisfile_riff_WAVE['fmt '][0]['data']);
                    $thisfile_audio['wformattag'] = $thisfile_riff_audio[$streamindex]['raw']['wFormatTag'];
                    if (!isset($thisfile_riff_audio[$streamindex]['bitrate']) || ($thisfile_riff_audio[$streamindex]['bitrate'] == 0)) {
                        $info['error'][] = 'Corrupt RIFF file: bitrate_audio == zero';

                        return false;
                    }
                    $thisfile_riff_raw['fmt '] = $thisfile_riff_audio[$streamindex]['raw'];
                    unset($thisfile_riff_audio[$streamindex]['raw']);
                    $thisfile_audio['streams'][$streamindex] = $thisfile_riff_audio[$streamindex];

                    $thisfile_audio = Helper::array_merge_noclobber($thisfile_audio, $thisfile_riff_audio[$streamindex]);
                    if (substr($thisfile_audio['codec'], 0, strlen('unknown: 0x')) == 'unknown: 0x') {
                        $info['warning'][] = 'Audio codec = '.$thisfile_audio['codec'];
                    }
                    $thisfile_audio['bitrate'] = $thisfile_riff_audio[$streamindex]['bitrate'];

                    $info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $thisfile_audio['bitrate']);

                    $thisfile_audio['lossless'] = false;
                    if (isset($thisfile_riff_WAVE['data'][0]['offset']) && isset($thisfile_riff_raw['fmt ']['wFormatTag'])) {
                        switch ($thisfile_riff_raw['fmt ']['wFormatTag']) {

                            case 0x0001:  // PCM
                                $thisfile_audio['lossless'] = true;
                                break;

                            case 0x2000:  // AC-3
                                $thisfile_audio_dataformat = 'ac3';
                                break;

                            default:
                                // do nothing
                                break;

                        }
                    }
                    $thisfile_audio['streams'][$streamindex]['wformattag'] = $thisfile_audio['wformattag'];
                    $thisfile_audio['streams'][$streamindex]['bitrate_mode'] = $thisfile_audio['bitrate_mode'];
                    $thisfile_audio['streams'][$streamindex]['lossless'] = $thisfile_audio['lossless'];
                    $thisfile_audio['streams'][$streamindex]['dataformat'] = $thisfile_audio_dataformat;
                }

                if (isset($thisfile_riff_WAVE['rgad'][0]['data'])) {

                    // shortcuts
                    $rgadData = &$thisfile_riff_WAVE['rgad'][0]['data'];
                    $thisfile_riff_raw['rgad'] = array('track' => array(), 'album' => array());
                    $thisfile_riff_raw_rgad = &$thisfile_riff_raw['rgad'];
                    $thisfile_riff_raw_rgad_track = &$thisfile_riff_raw_rgad['track'];
                    $thisfile_riff_raw_rgad_album = &$thisfile_riff_raw_rgad['album'];

                    $thisfile_riff_raw_rgad['fPeakAmplitude'] = Helper::LittleEndian2Float(substr($rgadData, 0, 4));
                    $thisfile_riff_raw_rgad['nRadioRgAdjust'] = $this->EitherEndian2Int(substr($rgadData, 4, 2));
                    $thisfile_riff_raw_rgad['nAudiophileRgAdjust'] = $this->EitherEndian2Int(substr($rgadData, 6, 2));

                    $nRadioRgAdjustBitstring = str_pad(Helper::Dec2Bin($thisfile_riff_raw_rgad['nRadioRgAdjust']), 16, '0', STR_PAD_LEFT);
                    $nAudiophileRgAdjustBitstring = str_pad(Helper::Dec2Bin($thisfile_riff_raw_rgad['nAudiophileRgAdjust']), 16, '0', STR_PAD_LEFT);
                    $thisfile_riff_raw_rgad_track['name'] = Helper::Bin2Dec(substr($nRadioRgAdjustBitstring, 0, 3));
                    $thisfile_riff_raw_rgad_track['originator'] = Helper::Bin2Dec(substr($nRadioRgAdjustBitstring, 3, 3));
                    $thisfile_riff_raw_rgad_track['signbit'] = Helper::Bin2Dec(substr($nRadioRgAdjustBitstring, 6, 1));
                    $thisfile_riff_raw_rgad_track['adjustment'] = Helper::Bin2Dec(substr($nRadioRgAdjustBitstring, 7, 9));
                    $thisfile_riff_raw_rgad_album['name'] = Helper::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 0, 3));
                    $thisfile_riff_raw_rgad_album['originator'] = Helper::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 3, 3));
                    $thisfile_riff_raw_rgad_album['signbit'] = Helper::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 6, 1));
                    $thisfile_riff_raw_rgad_album['adjustment'] = Helper::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 7, 9));

                    $thisfile_riff['rgad']['peakamplitude'] = $thisfile_riff_raw_rgad['fPeakAmplitude'];
                    if (($thisfile_riff_raw_rgad_track['name'] != 0) && ($thisfile_riff_raw_rgad_track['originator'] != 0)) {
                        $thisfile_riff['rgad']['track']['name'] = Helper::RGADnameLookup($thisfile_riff_raw_rgad_track['name']);
                        $thisfile_riff['rgad']['track']['originator'] = Helper::RGADoriginatorLookup($thisfile_riff_raw_rgad_track['originator']);
                        $thisfile_riff['rgad']['track']['adjustment'] = Helper::RGADadjustmentLookup($thisfile_riff_raw_rgad_track['adjustment'], $thisfile_riff_raw_rgad_track['signbit']);
                    }
                    if (($thisfile_riff_raw_rgad_album['name'] != 0) && ($thisfile_riff_raw_rgad_album['originator'] != 0)) {
                        $thisfile_riff['rgad']['album']['name'] = Helper::RGADnameLookup($thisfile_riff_raw_rgad_album['name']);
                        $thisfile_riff['rgad']['album']['originator'] = Helper::RGADoriginatorLookup($thisfile_riff_raw_rgad_album['originator']);
                        $thisfile_riff['rgad']['album']['adjustment'] = Helper::RGADadjustmentLookup($thisfile_riff_raw_rgad_album['adjustment'], $thisfile_riff_raw_rgad_album['signbit']);
                    }
                }

                if (isset($thisfile_riff_WAVE['fact'][0]['data'])) {
                    $thisfile_riff_raw['fact']['NumberOfSamples'] = $this->EitherEndian2Int(substr($thisfile_riff_WAVE['fact'][0]['data'], 0, 4));

                    // This should be a good way of calculating exact playtime,
                    // but some sample files have had incorrect number of samples,
                    // so cannot use this method

                    // if (!empty($thisfile_riff_raw['fmt ']['nSamplesPerSec'])) {
                    //     $info['playtime_seconds'] = (float) $thisfile_riff_raw['fact']['NumberOfSamples'] / $thisfile_riff_raw['fmt ']['nSamplesPerSec'];
                    // }
                }
                if (!empty($thisfile_riff_raw['fmt ']['nAvgBytesPerSec'])) {
                    $thisfile_audio['bitrate'] = Helper::CastAsInt($thisfile_riff_raw['fmt ']['nAvgBytesPerSec'] * 8);
                }

                if (isset($thisfile_riff_WAVE['bext'][0]['data'])) {
                    // shortcut
                    $thisfile_riff_WAVE_bext_0 = &$thisfile_riff_WAVE['bext'][0];

                    $thisfile_riff_WAVE_bext_0['title'] = trim(substr($thisfile_riff_WAVE_bext_0['data'], 0, 256));
                    $thisfile_riff_WAVE_bext_0['author'] = trim(substr($thisfile_riff_WAVE_bext_0['data'], 256, 32));
                    $thisfile_riff_WAVE_bext_0['reference'] = trim(substr($thisfile_riff_WAVE_bext_0['data'], 288, 32));
                    $thisfile_riff_WAVE_bext_0['origin_date'] = substr($thisfile_riff_WAVE_bext_0['data'], 320, 10);
                    $thisfile_riff_WAVE_bext_0['origin_time'] = substr($thisfile_riff_WAVE_bext_0['data'], 330, 8);
                    $thisfile_riff_WAVE_bext_0['time_reference'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_bext_0['data'], 338, 8));
                    $thisfile_riff_WAVE_bext_0['bwf_version'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_bext_0['data'], 346, 1));
                    $thisfile_riff_WAVE_bext_0['reserved'] = substr($thisfile_riff_WAVE_bext_0['data'], 347, 254);
                    $thisfile_riff_WAVE_bext_0['coding_history'] = explode("\r\n", trim(substr($thisfile_riff_WAVE_bext_0['data'], 601)));
                    if (preg_match('#^([0-9]{4}).([0-9]{2}).([0-9]{2})$#', $thisfile_riff_WAVE_bext_0['origin_date'], $matches_bext_date)) {
                        if (preg_match('#^([0-9]{2}).([0-9]{2}).([0-9]{2})$#', $thisfile_riff_WAVE_bext_0['origin_time'], $matches_bext_time)) {
                            list($dummy, $bext_timestamp['year'], $bext_timestamp['month'], $bext_timestamp['day']) = $matches_bext_date;
                            list($dummy, $bext_timestamp['hour'], $bext_timestamp['minute'], $bext_timestamp['second']) = $matches_bext_time;
                            $thisfile_riff_WAVE_bext_0['origin_date_unix'] = gmmktime($bext_timestamp['hour'], $bext_timestamp['minute'], $bext_timestamp['second'], $bext_timestamp['month'], $bext_timestamp['day'], $bext_timestamp['year']);
                        } else {
                            $info['warning'][] = 'RIFF.WAVE.BEXT.origin_time is invalid';
                        }
                    } else {
                        $info['warning'][] = 'RIFF.WAVE.BEXT.origin_date is invalid';
                    }
                    $thisfile_riff['comments']['author'][] = $thisfile_riff_WAVE_bext_0['author'];
                    $thisfile_riff['comments']['title'][] = $thisfile_riff_WAVE_bext_0['title'];
                }

                if (isset($thisfile_riff_WAVE['MEXT'][0]['data'])) {
                    // shortcut
                    $thisfile_riff_WAVE_MEXT_0 = &$thisfile_riff_WAVE['MEXT'][0];

                    $thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 0, 2));
                    $thisfile_riff_WAVE_MEXT_0['flags']['homogenous'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0001);
                    if ($thisfile_riff_WAVE_MEXT_0['flags']['homogenous']) {
                        $thisfile_riff_WAVE_MEXT_0['flags']['padding'] = ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0002) ? false : true;
                        $thisfile_riff_WAVE_MEXT_0['flags']['22_or_44'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0004);
                        $thisfile_riff_WAVE_MEXT_0['flags']['free_format'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0008);

                        $thisfile_riff_WAVE_MEXT_0['nominal_frame_size'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 2, 2));
                    }
                    $thisfile_riff_WAVE_MEXT_0['anciliary_data_length'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 6, 2));
                    $thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 8, 2));
                    $thisfile_riff_WAVE_MEXT_0['flags']['anciliary_data_left'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] & 0x0001);
                    $thisfile_riff_WAVE_MEXT_0['flags']['anciliary_data_free'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] & 0x0002);
                    $thisfile_riff_WAVE_MEXT_0['flags']['anciliary_data_right'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] & 0x0004);
                }

                if (isset($thisfile_riff_WAVE['cart'][0]['data'])) {
                    // shortcut
                    $thisfile_riff_WAVE_cart_0 = &$thisfile_riff_WAVE['cart'][0];

                    $thisfile_riff_WAVE_cart_0['version'] = substr($thisfile_riff_WAVE_cart_0['data'], 0, 4);
                    $thisfile_riff_WAVE_cart_0['title'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 4, 64));
                    $thisfile_riff_WAVE_cart_0['artist'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 68, 64));
                    $thisfile_riff_WAVE_cart_0['cut_id'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 132, 64));
                    $thisfile_riff_WAVE_cart_0['client_id'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 196, 64));
                    $thisfile_riff_WAVE_cart_0['category'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 260, 64));
                    $thisfile_riff_WAVE_cart_0['classification'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 324, 64));
                    $thisfile_riff_WAVE_cart_0['out_cue'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 388, 64));
                    $thisfile_riff_WAVE_cart_0['start_date'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 452, 10));
                    $thisfile_riff_WAVE_cart_0['start_time'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 462, 8));
                    $thisfile_riff_WAVE_cart_0['end_date'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 470, 10));
                    $thisfile_riff_WAVE_cart_0['end_time'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 480, 8));
                    $thisfile_riff_WAVE_cart_0['producer_app_id'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 488, 64));
                    $thisfile_riff_WAVE_cart_0['producer_app_version'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 552, 64));
                    $thisfile_riff_WAVE_cart_0['user_defined_text'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 616, 64));
                    $thisfile_riff_WAVE_cart_0['zero_db_reference'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_cart_0['data'], 680, 4), true);
                    for ($i = 0; $i < 8; ++$i) {
                        $thisfile_riff_WAVE_cart_0['post_time'][$i]['usage_fourcc'] = substr($thisfile_riff_WAVE_cart_0['data'], 684 + ($i * 8), 4);
                        $thisfile_riff_WAVE_cart_0['post_time'][$i]['timer_value'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE_cart_0['data'], 684 + ($i * 8) + 4, 4));
                    }
                    $thisfile_riff_WAVE_cart_0['url'] = trim(substr($thisfile_riff_WAVE_cart_0['data'], 748, 1024));
                    $thisfile_riff_WAVE_cart_0['tag_text'] = explode("\r\n", trim(substr($thisfile_riff_WAVE_cart_0['data'], 1772)));

                    $thisfile_riff['comments']['artist'][] = $thisfile_riff_WAVE_cart_0['artist'];
                    $thisfile_riff['comments']['title'][] = $thisfile_riff_WAVE_cart_0['title'];
                }

                if (isset($thisfile_riff_WAVE['SNDM'][0]['data'])) {
                    // SoundMiner metadata

                    // shortcuts
                    $thisfile_riff_WAVE_SNDM_0 = &$thisfile_riff_WAVE['SNDM'][0];
                    $thisfile_riff_WAVE_SNDM_0_data = &$thisfile_riff_WAVE_SNDM_0['data'];
                    $SNDM_startoffset = 0;
                    $SNDM_endoffset = $thisfile_riff_WAVE_SNDM_0['size'];

                    while ($SNDM_startoffset < $SNDM_endoffset) {
                        $SNDM_thisTagOffset = 0;
                        $SNDM_thisTagSize = Helper::BigEndian2Int(substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 4));
                        $SNDM_thisTagOffset += 4;
                        $SNDM_thisTagKey = substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 4);
                        $SNDM_thisTagOffset += 4;
                        $SNDM_thisTagDataSize = Helper::BigEndian2Int(substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 2));
                        $SNDM_thisTagOffset += 2;
                        $SNDM_thisTagDataFlags = Helper::BigEndian2Int(substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 2));
                        $SNDM_thisTagOffset += 2;
                        $SNDM_thisTagDataText = substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, $SNDM_thisTagDataSize);
                        $SNDM_thisTagOffset += $SNDM_thisTagDataSize;

                        if ($SNDM_thisTagSize != (4 + 4 + 2 + 2 + $SNDM_thisTagDataSize)) {
                            $info['warning'][] = 'RIFF.WAVE.SNDM.data contains tag not expected length (expected: '.$SNDM_thisTagSize.', found: '.(4 + 4 + 2 + 2 + $SNDM_thisTagDataSize).') at offset '.$SNDM_startoffset.' (file offset '.($thisfile_riff_WAVE_SNDM_0['offset'] + $SNDM_startoffset).')';
                            break;
                        } elseif ($SNDM_thisTagSize <= 0) {
                            $info['warning'][] = 'RIFF.WAVE.SNDM.data contains zero-size tag at offset '.$SNDM_startoffset.' (file offset '.($thisfile_riff_WAVE_SNDM_0['offset'] + $SNDM_startoffset).')';
                            break;
                        }
                        $SNDM_startoffset += $SNDM_thisTagSize;

                        $thisfile_riff_WAVE_SNDM_0['parsed_raw'][$SNDM_thisTagKey] = $SNDM_thisTagDataText;
                        if ($parsedkey = $this->RIFFwaveSNDMtagLookup($SNDM_thisTagKey)) {
                            $thisfile_riff_WAVE_SNDM_0['parsed'][$parsedkey] = $SNDM_thisTagDataText;
                        } else {
                            $info['warning'][] = 'RIFF.WAVE.SNDM contains unknown tag "'.$SNDM_thisTagKey.'" at offset '.$SNDM_startoffset.' (file offset '.($thisfile_riff_WAVE_SNDM_0['offset'] + $SNDM_startoffset).')';
                        }
                    }

                    $tagmapping = array(
                        'tracktitle' => 'title',
                        'category' => 'genre',
                        'cdtitle' => 'album',
                        'tracktitle' => 'title',
                    );
                    foreach ($tagmapping as $fromkey => $tokey) {
                        if (isset($thisfile_riff_WAVE_SNDM_0['parsed'][$fromkey])) {
                            $thisfile_riff['comments'][$tokey][] = $thisfile_riff_WAVE_SNDM_0['parsed'][$fromkey];
                        }
                    }
                }

                if (isset($thisfile_riff_WAVE['iXML'][0]['data'])) {
                    // requires functions simplexml_load_string and get_object_vars
                    if ($parsedXML = Helper::XML2array($thisfile_riff_WAVE['iXML'][0]['data'])) {
                        $thisfile_riff_WAVE['iXML'][0]['parsed'] = $parsedXML;
                        if (isset($parsedXML['SPEED']['MASTER_SPEED'])) {
                            @list($numerator, $denominator) = explode('/', $parsedXML['SPEED']['MASTER_SPEED']);
                            $thisfile_riff_WAVE['iXML'][0]['master_speed'] = $numerator / ($denominator ? $denominator : 1000);
                        }
                        if (isset($parsedXML['SPEED']['TIMECODE_RATE'])) {
                            @list($numerator, $denominator) = explode('/', $parsedXML['SPEED']['TIMECODE_RATE']);
                            $thisfile_riff_WAVE['iXML'][0]['timecode_rate'] = $numerator / ($denominator ? $denominator : 1000);
                        }
                        if (isset($parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_LO']) && !empty($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) && !empty($thisfile_riff_WAVE['iXML'][0]['timecode_rate'])) {
                            $samples_since_midnight = floatval(ltrim($parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_HI'].$parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_LO'], '0'));
                            $thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] = $samples_since_midnight / $parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE'];
                            $h = floor($thisfile_riff_WAVE['iXML'][0]['timecode_seconds']       / 3600);
                            $m = floor(($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600))      / 60);
                            $s = floor($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600) - ($m * 60));
                            $f = ($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600) - ($m * 60) - $s) * $thisfile_riff_WAVE['iXML'][0]['timecode_rate'];
                            $thisfile_riff_WAVE['iXML'][0]['timecode_string'] = sprintf('%02d:%02d:%02d:%05.2f', $h, $m, $s, $f);
                            $thisfile_riff_WAVE['iXML'][0]['timecode_string_round'] = sprintf('%02d:%02d:%02d:%02d', $h, $m, $s, round($f));
                        }
                        unset($parsedXML);
                    }
                }

                if (!isset($thisfile_audio['bitrate']) && isset($thisfile_riff_audio[$streamindex]['bitrate'])) {
                    $thisfile_audio['bitrate'] = $thisfile_riff_audio[$streamindex]['bitrate'];
                    $info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $thisfile_audio['bitrate']);
                }

                if (!empty($info['wavpack'])) {
                    $thisfile_audio_dataformat = 'wavpack';
                    $thisfile_audio['bitrate_mode'] = 'vbr';
                    $thisfile_audio['encoder'] = 'WavPack v'.$info['wavpack']['version'];

                    // Reset to the way it was - RIFF parsing will have messed this up
                    $info['avdataend'] = $Original['avdataend'];
                    $thisfile_audio['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];

                    fseek($this->getid3->fp, $info['avdataoffset'] - 44, SEEK_SET);
                    $RIFFdata = fread($this->getid3->fp, 44);
                    $OrignalRIFFheaderSize = Helper::LittleEndian2Int(substr($RIFFdata, 4, 4)) +  8;
                    $OrignalRIFFdataSize = Helper::LittleEndian2Int(substr($RIFFdata, 40, 4)) + 44;

                    if ($OrignalRIFFheaderSize > $OrignalRIFFdataSize) {
                        $info['avdataend'] -= ($OrignalRIFFheaderSize - $OrignalRIFFdataSize);
                        fseek($this->getid3->fp, $info['avdataend'], SEEK_SET);
                        $RIFFdata .= fread($this->getid3->fp, $OrignalRIFFheaderSize - $OrignalRIFFdataSize);
                    }

                    // move the data chunk after all other chunks (if any)
                    // so that the RIFF parser doesn't see EOF when trying
                    // to skip over the data chunk
                    $RIFFdata = substr($RIFFdata, 0, 36).substr($RIFFdata, 44).substr($RIFFdata, 36, 8);
                    $getid3_riff = new self($this->getid3);
                    $getid3_riff->ParseRIFFdata($RIFFdata);
                    unset($getid3_riff);
                }

                if (isset($thisfile_riff_raw['fmt ']['wFormatTag'])) {
                    switch ($thisfile_riff_raw['fmt ']['wFormatTag']) {
                        case 0x0001: // PCM
                            if (!empty($info['ac3'])) {
                                // Dolby Digital WAV files masquerade as PCM-WAV, but they're not
                                $thisfile_audio['wformattag'] = 0x2000;
                                $thisfile_audio['codec'] = $this->RIFFwFormatTagLookup($thisfile_audio['wformattag']);
                                $thisfile_audio['lossless'] = false;
                                $thisfile_audio['bitrate'] = $info['ac3']['bitrate'];
                                $thisfile_audio['sample_rate'] = $info['ac3']['sample_rate'];
                            }
                            break;
                        case 0x08AE: // ClearJump LiteWave
                            $thisfile_audio['bitrate_mode'] = 'vbr';
                            $thisfile_audio_dataformat = 'litewave';

                            //typedef struct tagSLwFormat {
                            //  WORD    m_wCompFormat;     // low byte defines compression method, high byte is compression flags
                            //  DWORD   m_dwScale;         // scale factor for lossy compression
                            //  DWORD   m_dwBlockSize;     // number of samples in encoded blocks
                            //  WORD    m_wQuality;        // alias for the scale factor
                            //  WORD    m_wMarkDistance;   // distance between marks in bytes
                            //  WORD    m_wReserved;
                            //
                            //  //following paramters are ignored if CF_FILESRC is not set
                            //  DWORD   m_dwOrgSize;       // original file size in bytes
                            //  WORD    m_bFactExists;     // indicates if 'fact' chunk exists in the original file
                            //  DWORD   m_dwRiffChunkSize; // riff chunk size in the original file
                            //
                            //  PCMWAVEFORMAT m_OrgWf;     // original wave format
                            // }SLwFormat, *PSLwFormat;

                            // shortcut
                            $thisfile_riff['litewave']['raw'] = array();
                            $thisfile_riff_litewave = &$thisfile_riff['litewave'];
                            $thisfile_riff_litewave_raw = &$thisfile_riff_litewave['raw'];

                            $thisfile_riff_litewave_raw['compression_method'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 18, 1));
                            $thisfile_riff_litewave_raw['compression_flags'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 19, 1));
                            $thisfile_riff_litewave_raw['m_dwScale'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 20, 4));
                            $thisfile_riff_litewave_raw['m_dwBlockSize'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 24, 4));
                            $thisfile_riff_litewave_raw['m_wQuality'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 28, 2));
                            $thisfile_riff_litewave_raw['m_wMarkDistance'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 30, 2));
                            $thisfile_riff_litewave_raw['m_wReserved'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 32, 2));
                            $thisfile_riff_litewave_raw['m_dwOrgSize'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 34, 4));
                            $thisfile_riff_litewave_raw['m_bFactExists'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 38, 2));
                            $thisfile_riff_litewave_raw['m_dwRiffChunkSize'] = Helper::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], 40, 4));

                            //$thisfile_riff_litewave['quality_factor'] = intval(round((2000 - $thisfile_riff_litewave_raw['m_dwScale']) / 20));
                            $thisfile_riff_litewave['quality_factor'] = $thisfile_riff_litewave_raw['m_wQuality'];

                            $thisfile_riff_litewave['flags']['raw_source'] = ($thisfile_riff_litewave_raw['compression_flags'] & 0x01) ? false : true;
                            $thisfile_riff_litewave['flags']['vbr_blocksize'] = ($thisfile_riff_litewave_raw['compression_flags'] & 0x02) ? false : true;
                            $thisfile_riff_litewave['flags']['seekpoints'] = (bool) ($thisfile_riff_litewave_raw['compression_flags'] & 0x04);

                            $thisfile_audio['lossless'] = (($thisfile_riff_litewave_raw['m_wQuality'] == 100) ? true : false);
                            $thisfile_audio['encoder_options'] = '-q'.$thisfile_riff_litewave['quality_factor'];
                            break;

                        default:
                            break;
                    }
                }
                if ($info['avdataend'] > $info['filesize']) {
                    switch (!empty($thisfile_audio_dataformat) ? $thisfile_audio_dataformat : '') {
                        case 'wavpack': // WavPack
                        case 'lpac':    // LPAC
                        case 'ofr':     // OptimFROG
                        case 'ofs':     // OptimFROG DualStream
                            // lossless compressed audio formats that keep original RIFF headers - skip warning
                            break;

                        case 'litewave':
                            if (($info['avdataend'] - $info['filesize']) == 1) {
                                // LiteWave appears to incorrectly *not* pad actual output file
                                // to nearest WORD boundary so may appear to be short by one
                                // byte, in which case - skip warning
                            } else {
                                // Short by more than one byte, throw warning
                                $info['warning'][] = 'Probably truncated file - expecting '.$thisfile_riff[$RIFFsubtype]['data'][0]['size'].' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' (short by '.($thisfile_riff[$RIFFsubtype]['data'][0]['size'] - ($info['filesize'] - $info['avdataoffset'])).' bytes)';
                                $info['avdataend'] = $info['filesize'];
                            }
                            break;

                        default:
                            if ((($info['avdataend'] - $info['filesize']) == 1) && (($thisfile_riff[$RIFFsubtype]['data'][0]['size'] % 2) == 0) && ((($info['filesize'] - $info['avdataoffset']) % 2) == 1)) {
                                // output file appears to be incorrectly *not* padded to nearest WORD boundary
                                // Output less severe warning
                                $info['warning'][] = 'File should probably be padded to nearest WORD boundary, but it is not (expecting '.$thisfile_riff[$RIFFsubtype]['data'][0]['size'].' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' therefore short by '.($thisfile_riff[$RIFFsubtype]['data'][0]['size'] - ($info['filesize'] - $info['avdataoffset'])).' bytes)';
                                $info['avdataend'] = $info['filesize'];
                            } else {
                                // Short by more than one byte, throw warning
                                $info['warning'][] = 'Probably truncated file - expecting '.$thisfile_riff[$RIFFsubtype]['data'][0]['size'].' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' (short by '.($thisfile_riff[$RIFFsubtype]['data'][0]['size'] - ($info['filesize'] - $info['avdataoffset'])).' bytes)';
                                $info['avdataend'] = $info['filesize'];
                            }
                            break;
                    }
                }
                if (!empty($info['mpeg']['audio']['LAME']['audio_bytes'])) {
                    if ((($info['avdataend'] - $info['avdataoffset']) - $info['mpeg']['audio']['LAME']['audio_bytes']) == 1) {
                        --$info['avdataend'];
                        $info['warning'][] = 'Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored';
                    }
                }
                if (isset($thisfile_audio_dataformat) && ($thisfile_audio_dataformat == 'ac3')) {
                    unset($thisfile_audio['bits_per_sample']);
                    if (!empty($info['ac3']['bitrate']) && ($info['ac3']['bitrate'] != $thisfile_audio['bitrate'])) {
                        $thisfile_audio['bitrate'] = $info['ac3']['bitrate'];
                    }
                }
                break;

            case 'AVI ':
                $thisfile_video['bitrate_mode'] = 'vbr'; // maybe not, but probably
                $thisfile_video['dataformat'] = 'avi';
                $info['mime_type'] = 'video/avi';

                if (isset($thisfile_riff[$RIFFsubtype]['movi']['offset'])) {
                    $info['avdataoffset'] = $thisfile_riff[$RIFFsubtype]['movi']['offset'] + 8;
                    if (isset($thisfile_riff['AVIX'])) {
                        $info['avdataend'] = $thisfile_riff['AVIX'][(count($thisfile_riff['AVIX']) - 1)]['chunks']['movi']['offset'] + $thisfile_riff['AVIX'][(count($thisfile_riff['AVIX']) - 1)]['chunks']['movi']['size'];
                    } else {
                        $info['avdataend'] = $thisfile_riff['AVI ']['movi']['offset'] + $thisfile_riff['AVI ']['movi']['size'];
                    }
                    if ($info['avdataend'] > $info['filesize']) {
                        $info['warning'][] = 'Probably truncated file - expecting '.($info['avdataend'] - $info['avdataoffset']).' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' (short by '.($info['avdataend'] - $info['filesize']).' bytes)';
                        $info['avdataend'] = $info['filesize'];
                    }
                }

                if (isset($thisfile_riff['AVI ']['hdrl']['strl']['indx'])) {
                    //$bIndexType = array(
                    //    0x00 => 'AVI_INDEX_OF_INDEXES',
                    //	0x01 => 'AVI_INDEX_OF_CHUNKS',
                    //	0x80 => 'AVI_INDEX_IS_DATA',
                    //);
                    //$bIndexSubtype = array(
                    //	0x01 => array(
                    //		0x01 => 'AVI_INDEX_2FIELD',
                    //	),
                    //);
                    foreach ($thisfile_riff['AVI ']['hdrl']['strl']['indx'] as $streamnumber => $steamdataarray) {
                        $thisfile_riff_avi_hdrl_strl_indx_stream_data = &$thisfile_riff['AVI ']['hdrl']['strl']['indx'][$streamnumber]['data'];

                        $thisfile_riff_raw['indx'][$streamnumber]['wLongsPerEntry'] = $this->EitherEndian2Int(substr($thisfile_riff_avi_hdrl_strl_indx_stream_data, 0, 2));
                        $thisfile_riff_raw['indx'][$streamnumber]['bIndexSubType'] = $this->EitherEndian2Int(substr($thisfile_riff_avi_hdrl_strl_indx_stream_data, 2, 1));
                        $thisfile_riff_raw['indx'][$streamnumber]['bIndexType'] = $this->EitherEndian2Int(substr($thisfile_riff_avi_hdrl_strl_indx_stream_data, 3, 1));
                        $thisfile_riff_raw['indx'][$streamnumber]['nEntriesInUse'] = $this->EitherEndian2Int(substr($thisfile_riff_avi_hdrl_strl_indx_stream_data, 4, 4));
                        $thisfile_riff_raw['indx'][$streamnumber]['dwChunkId'] = substr($thisfile_riff_avi_hdrl_strl_indx_stream_data, 8, 4);
                        $thisfile_riff_raw['indx'][$streamnumber]['dwReserved'] = $this->EitherEndian2Int(substr($thisfile_riff_avi_hdrl_strl_indx_stream_data, 12, 4));

                        //$thisfile_riff_raw['indx'][$streamnumber]['bIndexType_name']    =    $bIndexType[$thisfile_riff_raw['indx'][$streamnumber]['bIndexType']];
                        //$thisfile_riff_raw['indx'][$streamnumber]['bIndexSubType_name'] = $bIndexSubtype[$thisfile_riff_raw['indx'][$streamnumber]['bIndexType']][$thisfile_riff_raw['indx'][$streamnumber]['bIndexSubType']];

                        unset($thisfile_riff_avi_hdrl_strl_indx_stream_data);
                    }
                }
                if (isset($thisfile_riff['AVI ']['hdrl']['avih'][$streamindex]['data'])) {
                    $avihData = $thisfile_riff['AVI ']['hdrl']['avih'][$streamindex]['data'];

                    // shortcut
                    $thisfile_riff_raw['avih'] = array();
                    $thisfile_riff_raw_avih = &$thisfile_riff_raw['avih'];

                    $thisfile_riff_raw_avih['dwMicroSecPerFrame'] = $this->EitherEndian2Int(substr($avihData, 0, 4)); // frame display rate (or 0L)
                    if ($thisfile_riff_raw_avih['dwMicroSecPerFrame'] == 0) {
                        $info['error'][] = 'Corrupt RIFF file: avih.dwMicroSecPerFrame == zero';

                        return false;
                    }
                    $thisfile_riff_raw_avih['dwMaxBytesPerSec'] = $this->EitherEndian2Int(substr($avihData, 4, 4)); // max. transfer rate
                    $thisfile_riff_raw_avih['dwPaddingGranularity'] = $this->EitherEndian2Int(substr($avihData, 8, 4)); // pad to multiples of this size; normally 2K.
                    $thisfile_riff_raw_avih['dwFlags'] = $this->EitherEndian2Int(substr($avihData, 12, 4)); // the ever-present flags
                    $thisfile_riff_raw_avih['dwTotalFrames'] = $this->EitherEndian2Int(substr($avihData, 16, 4)); // # frames in file
                    $thisfile_riff_raw_avih['dwInitialFrames'] = $this->EitherEndian2Int(substr($avihData, 20, 4));
                    $thisfile_riff_raw_avih['dwStreams'] = $this->EitherEndian2Int(substr($avihData, 24, 4));
                    $thisfile_riff_raw_avih['dwSuggestedBufferSize'] = $this->EitherEndian2Int(substr($avihData, 28, 4));
                    $thisfile_riff_raw_avih['dwWidth'] = $this->EitherEndian2Int(substr($avihData, 32, 4));
                    $thisfile_riff_raw_avih['dwHeight'] = $this->EitherEndian2Int(substr($avihData, 36, 4));
                    $thisfile_riff_raw_avih['dwScale'] = $this->EitherEndian2Int(substr($avihData, 40, 4));
                    $thisfile_riff_raw_avih['dwRate'] = $this->EitherEndian2Int(substr($avihData, 44, 4));
                    $thisfile_riff_raw_avih['dwStart'] = $this->EitherEndian2Int(substr($avihData, 48, 4));
                    $thisfile_riff_raw_avih['dwLength'] = $this->EitherEndian2Int(substr($avihData, 52, 4));

                    $thisfile_riff_raw_avih['flags']['hasindex'] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & 0x00000010);
                    $thisfile_riff_raw_avih['flags']['mustuseindex'] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & 0x00000020);
                    $thisfile_riff_raw_avih['flags']['interleaved'] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & 0x00000100);
                    $thisfile_riff_raw_avih['flags']['trustcktype'] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & 0x00000800);
                    $thisfile_riff_raw_avih['flags']['capturedfile'] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & 0x00010000);
                    $thisfile_riff_raw_avih['flags']['copyrighted'] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & 0x00020010);

                    // shortcut
                    $thisfile_riff_video[$streamindex] = array();
                    $thisfile_riff_video_current = &$thisfile_riff_video[$streamindex];

                    if ($thisfile_riff_raw_avih['dwWidth'] > 0) {
                        $thisfile_riff_video_current['frame_width'] = $thisfile_riff_raw_avih['dwWidth'];
                        $thisfile_video['resolution_x'] = $thisfile_riff_video_current['frame_width'];
                    }
                    if ($thisfile_riff_raw_avih['dwHeight'] > 0) {
                        $thisfile_riff_video_current['frame_height'] = $thisfile_riff_raw_avih['dwHeight'];
                        $thisfile_video['resolution_y'] = $thisfile_riff_video_current['frame_height'];
                    }
                    if ($thisfile_riff_raw_avih['dwTotalFrames'] > 0) {
                        $thisfile_riff_video_current['total_frames'] = $thisfile_riff_raw_avih['dwTotalFrames'];
                        $thisfile_video['total_frames'] = $thisfile_riff_video_current['total_frames'];
                    }

                    $thisfile_riff_video_current['frame_rate'] = round(1000000 / $thisfile_riff_raw_avih['dwMicroSecPerFrame'], 3);
                    $thisfile_video['frame_rate'] = $thisfile_riff_video_current['frame_rate'];
                }
                if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strh'][0]['data'])) {
                    if (is_array($thisfile_riff['AVI ']['hdrl']['strl']['strh'])) {
                        for ($i = 0; $i < count($thisfile_riff['AVI ']['hdrl']['strl']['strh']); ++$i) {
                            if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strh'][$i]['data'])) {
                                $strhData = $thisfile_riff['AVI ']['hdrl']['strl']['strh'][$i]['data'];
                                $strhfccType = substr($strhData, 0, 4);

                                if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strf'][$i]['data'])) {
                                    $strfData = $thisfile_riff['AVI ']['hdrl']['strl']['strf'][$i]['data'];

                                    // shortcut
                                    $thisfile_riff_raw_strf_strhfccType_streamindex = &$thisfile_riff_raw['strf'][$strhfccType][$streamindex];

                                    switch ($strhfccType) {
                                        case 'auds':
                                            $thisfile_audio['bitrate_mode'] = 'cbr';
                                            $thisfile_audio_dataformat = 'wav';
                                            if (isset($thisfile_riff_audio) && is_array($thisfile_riff_audio)) {
                                                $streamindex = count($thisfile_riff_audio);
                                            }

                                            $thisfile_riff_audio[$streamindex] = self::RIFFparseWAVEFORMATex($strfData);
                                            $thisfile_audio['wformattag'] = $thisfile_riff_audio[$streamindex]['raw']['wFormatTag'];

                                            // shortcut
                                            $thisfile_audio['streams'][$streamindex] = $thisfile_riff_audio[$streamindex];
                                            $thisfile_audio_streams_currentstream = &$thisfile_audio['streams'][$streamindex];

                                            if ($thisfile_audio_streams_currentstream['bits_per_sample'] == 0) {
                                                unset($thisfile_audio_streams_currentstream['bits_per_sample']);
                                            }
                                            $thisfile_audio_streams_currentstream['wformattag'] = $thisfile_audio_streams_currentstream['raw']['wFormatTag'];
                                            unset($thisfile_audio_streams_currentstream['raw']);

                                            // shortcut
                                            $thisfile_riff_raw['strf'][$strhfccType][$streamindex] = $thisfile_riff_audio[$streamindex]['raw'];

                                            unset($thisfile_riff_audio[$streamindex]['raw']);
                                            $thisfile_audio = Helper::array_merge_noclobber($thisfile_audio, $thisfile_riff_audio[$streamindex]);

                                            $thisfile_audio['lossless'] = false;
                                            switch ($thisfile_riff_raw_strf_strhfccType_streamindex['wFormatTag']) {
                                                case 0x0001:  // PCM
                                                    $thisfile_audio_dataformat = 'wav';
                                                    $thisfile_audio['lossless'] = true;
                                                    break;

                                                case 0x0050: // MPEG Layer 2 or Layer 1
                                                    $thisfile_audio_dataformat = 'mp2'; // Assume Layer-2
                                                    break;

                                                case 0x0055: // MPEG Layer 3
                                                    $thisfile_audio_dataformat = 'mp3';
                                                    break;

                                                case 0x00FF: // AAC
                                                    $thisfile_audio_dataformat = 'aac';
                                                    break;

                                                case 0x0161: // Windows Media v7 / v8 / v9
                                                case 0x0162: // Windows Media Professional v9
                                                case 0x0163: // Windows Media Lossess v9
                                                    $thisfile_audio_dataformat = 'wma';
                                                    break;

                                                case 0x2000: // AC-3
                                                    $thisfile_audio_dataformat = 'ac3';
                                                    break;

                                                case 0x2001: // DTS
                                                    $thisfile_audio_dataformat = 'dts';
                                                    break;

                                                default:
                                                    $thisfile_audio_dataformat = 'wav';
                                                    break;
                                            }
                                            $thisfile_audio_streams_currentstream['dataformat'] = $thisfile_audio_dataformat;
                                            $thisfile_audio_streams_currentstream['lossless'] = $thisfile_audio['lossless'];
                                            $thisfile_audio_streams_currentstream['bitrate_mode'] = $thisfile_audio['bitrate_mode'];
                                            break;

                                        case 'iavs':
                                        case 'vids':
                                            // shortcut
                                            $thisfile_riff_raw['strh'][$i] = array();
                                            $thisfile_riff_raw_strh_current = &$thisfile_riff_raw['strh'][$i];

                                            $thisfile_riff_raw_strh_current['fccType'] = substr($strhData, 0, 4);  // same as $strhfccType;
                                            $thisfile_riff_raw_strh_current['fccHandler'] = substr($strhData, 4, 4);
                                            $thisfile_riff_raw_strh_current['dwFlags'] = $this->EitherEndian2Int(substr($strhData, 8, 4)); // Contains AVITF_* flags
                                            $thisfile_riff_raw_strh_current['wPriority'] = $this->EitherEndian2Int(substr($strhData, 12, 2));
                                            $thisfile_riff_raw_strh_current['wLanguage'] = $this->EitherEndian2Int(substr($strhData, 14, 2));
                                            $thisfile_riff_raw_strh_current['dwInitialFrames'] = $this->EitherEndian2Int(substr($strhData, 16, 4));
                                            $thisfile_riff_raw_strh_current['dwScale'] = $this->EitherEndian2Int(substr($strhData, 20, 4));
                                            $thisfile_riff_raw_strh_current['dwRate'] = $this->EitherEndian2Int(substr($strhData, 24, 4));
                                            $thisfile_riff_raw_strh_current['dwStart'] = $this->EitherEndian2Int(substr($strhData, 28, 4));
                                            $thisfile_riff_raw_strh_current['dwLength'] = $this->EitherEndian2Int(substr($strhData, 32, 4));
                                            $thisfile_riff_raw_strh_current['dwSuggestedBufferSize'] = $this->EitherEndian2Int(substr($strhData, 36, 4));
                                            $thisfile_riff_raw_strh_current['dwQuality'] = $this->EitherEndian2Int(substr($strhData, 40, 4));
                                            $thisfile_riff_raw_strh_current['dwSampleSize'] = $this->EitherEndian2Int(substr($strhData, 44, 4));
                                            $thisfile_riff_raw_strh_current['rcFrame'] = $this->EitherEndian2Int(substr($strhData, 48, 4));

                                            $thisfile_riff_video_current['codec'] = self::RIFFfourccLookup($thisfile_riff_raw_strh_current['fccHandler']);
                                            $thisfile_video['fourcc'] = $thisfile_riff_raw_strh_current['fccHandler'];
                                            if (!$thisfile_riff_video_current['codec'] && isset($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc']) && self::RIFFfourccLookup($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'])) {
                                                $thisfile_riff_video_current['codec'] = self::RIFFfourccLookup($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc']);
                                                $thisfile_video['fourcc'] = $thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'];
                                            }
                                            $thisfile_video['codec'] = $thisfile_riff_video_current['codec'];
                                            $thisfile_video['pixel_aspect_ratio'] = (float) 1;
                                            switch ($thisfile_riff_raw_strh_current['fccHandler']) {
                                                case 'HFYU': // Huffman Lossless Codec
                                                case 'IRAW': // Intel YUV Uncompressed
                                                case 'YUY2': // Uncompressed YUV 4:2:2
                                                    $thisfile_video['lossless'] = true;
                                                    break;

                                                default:
                                                    $thisfile_video['lossless'] = false;
                                                    break;
                                            }

                                            switch ($strhfccType) {
                                                case 'vids':
                                                    $thisfile_riff_raw_strf_strhfccType_streamindex = self::ParseBITMAPINFOHEADER(substr($strfData, 0, 40), ($info['fileformat'] == 'riff'));
//echo '<pre>'.print_r($thisfile_riff_raw_strf_strhfccType_streamindex, true).'</pre>';
                                                    $thisfile_video['bits_per_sample'] = $thisfile_riff_raw_strf_strhfccType_streamindex['biBitCount'];

                                                    if ($thisfile_riff_video_current['codec'] == 'DV') {
                                                        $thisfile_riff_video_current['dv_type'] = 2;
                                                    }
                                                    break;

                                                case 'iavs':
                                                    $thisfile_riff_video_current['dv_type'] = 1;
                                                    break;
                                            }
                                            break;

                                        default:
                                            $info['warning'][] = 'Unhandled fccType for stream ('.$i.'): "'.$strhfccType.'"';
                                            break;

                                    }
                                }
                            }

                            if (isset($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'])) {
                                $thisfile_video['fourcc'] = $thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'];
                                if (self::RIFFfourccLookup($thisfile_video['fourcc'])) {
                                    $thisfile_riff_video_current['codec'] = self::RIFFfourccLookup($thisfile_video['fourcc']);
                                    $thisfile_video['codec'] = $thisfile_riff_video_current['codec'];
                                }

                                switch ($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc']) {
                                    case 'HFYU': // Huffman Lossless Codec
                                    case 'IRAW': // Intel YUV Uncompressed
                                    case 'YUY2': // Uncompressed YUV 4:2:2
                                        $thisfile_video['lossless'] = true;
                                        //$thisfile_video['bits_per_sample'] = 24;
                                        break;

                                    default:
                                        $thisfile_video['lossless'] = false;
                                        //$thisfile_video['bits_per_sample'] = 24;
                                        break;
                                }
                            }
                        }
                    }
                }
                break;

            case 'CDDA':
                $thisfile_audio['bitrate_mode'] = 'cbr';
                $thisfile_audio_dataformat = 'cda';
                $thisfile_audio['lossless'] = true;
                unset($info['mime_type']);

                $info['avdataoffset'] = 44;

                if (isset($thisfile_riff['CDDA']['fmt '][0]['data'])) {
                    // shortcut
                    $thisfile_riff_CDDA_fmt_0 = &$thisfile_riff['CDDA']['fmt '][0];

                    $thisfile_riff_CDDA_fmt_0['unknown1'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 0, 2));
                    $thisfile_riff_CDDA_fmt_0['track_num'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 2, 2));
                    $thisfile_riff_CDDA_fmt_0['disc_id'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 4, 4));
                    $thisfile_riff_CDDA_fmt_0['start_offset_frame'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 8, 4));
                    $thisfile_riff_CDDA_fmt_0['playtime_frames'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 12, 4));
                    $thisfile_riff_CDDA_fmt_0['unknown6'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 16, 4));
                    $thisfile_riff_CDDA_fmt_0['unknown7'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 20, 4));

                    $thisfile_riff_CDDA_fmt_0['start_offset_seconds'] = (float) $thisfile_riff_CDDA_fmt_0['start_offset_frame'] / 75;
                    $thisfile_riff_CDDA_fmt_0['playtime_seconds'] = (float) $thisfile_riff_CDDA_fmt_0['playtime_frames'] / 75;
                    $info['comments']['track'] = $thisfile_riff_CDDA_fmt_0['track_num'];
                    $info['playtime_seconds'] = $thisfile_riff_CDDA_fmt_0['playtime_seconds'];

                    // hardcoded data for CD-audio
                    $thisfile_audio['sample_rate'] = 44100;
                    $thisfile_audio['channels'] = 2;
                    $thisfile_audio['bits_per_sample'] = 16;
                    $thisfile_audio['bitrate'] = $thisfile_audio['sample_rate'] * $thisfile_audio['channels'] * $thisfile_audio['bits_per_sample'];
                    $thisfile_audio['bitrate_mode'] = 'cbr';
                }
                break;

            case 'AIFF':
            case 'AIFC':
                $thisfile_audio['bitrate_mode'] = 'cbr';
                $thisfile_audio_dataformat = 'aiff';
                $thisfile_audio['lossless'] = true;
                $info['mime_type'] = 'audio/x-aiff';

                if (isset($thisfile_riff[$RIFFsubtype]['SSND'][0]['offset'])) {
                    $info['avdataoffset'] = $thisfile_riff[$RIFFsubtype]['SSND'][0]['offset'] + 8;
                    $info['avdataend'] = $info['avdataoffset'] + $thisfile_riff[$RIFFsubtype]['SSND'][0]['size'];
                    if ($info['avdataend'] > $info['filesize']) {
                        if (($info['avdataend'] == ($info['filesize'] + 1)) && (($info['filesize'] % 2) == 1)) {
                            // structures rounded to 2-byte boundary, but dumb encoders
                            // forget to pad end of file to make this actually work
                        } else {
                            $info['warning'][] = 'Probable truncated AIFF file: expecting '.$thisfile_riff[$RIFFsubtype]['SSND'][0]['size'].' bytes of audio data, only '.($info['filesize'] - $info['avdataoffset']).' bytes found';
                        }
                        $info['avdataend'] = $info['filesize'];
                    }
                }

                if (isset($thisfile_riff[$RIFFsubtype]['COMM'][0]['data'])) {

                    // shortcut
                    $thisfile_riff_RIFFsubtype_COMM_0_data = &$thisfile_riff[$RIFFsubtype]['COMM'][0]['data'];

                    $thisfile_riff_audio['channels'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data, 0, 2), true);
                    $thisfile_riff_audio['total_samples'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data, 2, 4), false);
                    $thisfile_riff_audio['bits_per_sample'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data, 6, 2), true);
                    $thisfile_riff_audio['sample_rate'] = (int) Helper::BigEndian2Float(substr($thisfile_riff_RIFFsubtype_COMM_0_data, 8, 10));

                    if ($thisfile_riff[$RIFFsubtype]['COMM'][0]['size'] > 18) {
                        $thisfile_riff_audio['codec_fourcc'] = substr($thisfile_riff_RIFFsubtype_COMM_0_data, 18, 4);
                        $CodecNameSize = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data, 22, 1), false);
                        $thisfile_riff_audio['codec_name'] = substr($thisfile_riff_RIFFsubtype_COMM_0_data, 23, $CodecNameSize);
                        switch ($thisfile_riff_audio['codec_name']) {
                            case 'NONE':
                                $thisfile_audio['codec'] = 'Pulse Code Modulation (PCM)';
                                $thisfile_audio['lossless'] = true;
                                break;

                            case '':
                                switch ($thisfile_riff_audio['codec_fourcc']) {
                                    // http://developer.apple.com/qa/snd/snd07.html
                                    case 'sowt':
                                        $thisfile_riff_audio['codec_name'] = 'Two\'s Compliment Little-Endian PCM';
                                        $thisfile_audio['lossless'] = true;
                                        break;

                                    case 'twos':
                                        $thisfile_riff_audio['codec_name'] = 'Two\'s Compliment Big-Endian PCM';
                                        $thisfile_audio['lossless'] = true;
                                        break;

                                    default:
                                        break;
                                }
                                break;

                            default:
                                $thisfile_audio['codec'] = $thisfile_riff_audio['codec_name'];
                                $thisfile_audio['lossless'] = false;
                                break;
                        }
                    }

                    $thisfile_audio['channels'] = $thisfile_riff_audio['channels'];
                    if ($thisfile_riff_audio['bits_per_sample'] > 0) {
                        $thisfile_audio['bits_per_sample'] = $thisfile_riff_audio['bits_per_sample'];
                    }
                    $thisfile_audio['sample_rate'] = $thisfile_riff_audio['sample_rate'];
                    if ($thisfile_audio['sample_rate'] == 0) {
                        $info['error'][] = 'Corrupted AIFF file: sample_rate == zero';

                        return false;
                    }
                    $info['playtime_seconds'] = $thisfile_riff_audio['total_samples'] / $thisfile_audio['sample_rate'];
                }

                if (isset($thisfile_riff[$RIFFsubtype]['COMT'])) {
                    $offset = 0;
                    $CommentCount = Helper::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 2), false);
                    $offset += 2;
                    for ($i = 0; $i < $CommentCount; ++$i) {
                        $info['comments_raw'][$i]['timestamp'] = Helper::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 4), false);
                        $offset += 4;
                        $info['comments_raw'][$i]['marker_id'] = Helper::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 2), true);
                        $offset += 2;
                        $CommentLength = Helper::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 2), false);
                        $offset += 2;
                        $info['comments_raw'][$i]['comment'] = substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, $CommentLength);
                        $offset += $CommentLength;

                        $info['comments_raw'][$i]['timestamp_unix'] = Helper::DateMac2Unix($info['comments_raw'][$i]['timestamp']);
                        $thisfile_riff['comments']['comment'][] = $info['comments_raw'][$i]['comment'];
                    }
                }

                $CommentsChunkNames = array('NAME' => 'title', 'author' => 'artist', '(c) ' => 'copyright', 'ANNO' => 'comment');
                foreach ($CommentsChunkNames as $key => $value) {
                    if (isset($thisfile_riff[$RIFFsubtype][$key][0]['data'])) {
                        $thisfile_riff['comments'][$value][] = $thisfile_riff[$RIFFsubtype][$key][0]['data'];
                    }
                }

                break;

            case '8SVX':
                $thisfile_audio['bitrate_mode'] = 'cbr';
                $thisfile_audio_dataformat = '8svx';
                $thisfile_audio['bits_per_sample'] = 8;
                $thisfile_audio['channels'] = 1; // overridden below, if need be
                $info['mime_type'] = 'audio/x-aiff';

                if (isset($thisfile_riff[$RIFFsubtype]['BODY'][0]['offset'])) {
                    $info['avdataoffset'] = $thisfile_riff[$RIFFsubtype]['BODY'][0]['offset'] + 8;
                    $info['avdataend'] = $info['avdataoffset'] + $thisfile_riff[$RIFFsubtype]['BODY'][0]['size'];
                    if ($info['avdataend'] > $info['filesize']) {
                        $info['warning'][] = 'Probable truncated AIFF file: expecting '.$thisfile_riff[$RIFFsubtype]['BODY'][0]['size'].' bytes of audio data, only '.($info['filesize'] - $info['avdataoffset']).' bytes found';
                    }
                }

                if (isset($thisfile_riff[$RIFFsubtype]['VHDR'][0]['offset'])) {
                    // shortcut
                    $thisfile_riff_RIFFsubtype_VHDR_0 = &$thisfile_riff[$RIFFsubtype]['VHDR'][0];

                    $thisfile_riff_RIFFsubtype_VHDR_0['oneShotHiSamples'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 0, 4));
                    $thisfile_riff_RIFFsubtype_VHDR_0['repeatHiSamples'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 4, 4));
                    $thisfile_riff_RIFFsubtype_VHDR_0['samplesPerHiCycle'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 8, 4));
                    $thisfile_riff_RIFFsubtype_VHDR_0['samplesPerSec'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 12, 2));
                    $thisfile_riff_RIFFsubtype_VHDR_0['ctOctave'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 14, 1));
                    $thisfile_riff_RIFFsubtype_VHDR_0['sCompression'] = Helper::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 15, 1));
                    $thisfile_riff_RIFFsubtype_VHDR_0['Volume'] = Helper::FixedPoint16_16(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 16, 4));

                    $thisfile_audio['sample_rate'] = $thisfile_riff_RIFFsubtype_VHDR_0['samplesPerSec'];

                    switch ($thisfile_riff_RIFFsubtype_VHDR_0['sCompression']) {
                        case 0:
                            $thisfile_audio['codec'] = 'Pulse Code Modulation (PCM)';
                            $thisfile_audio['lossless'] = true;
                            $ActualBitsPerSample = 8;
                            break;

                        case 1:
                            $thisfile_audio['codec'] = 'Fibonacci-delta encoding';
                            $thisfile_audio['lossless'] = false;
                            $ActualBitsPerSample = 4;
                            break;

                        default:
                            $info['warning'][] = 'Unexpected sCompression value in 8SVX.VHDR chunk - expecting 0 or 1, found "'.sCompression.'"';
                            break;
                    }
                }

                if (isset($thisfile_riff[$RIFFsubtype]['CHAN'][0]['data'])) {
                    $ChannelsIndex = Helper::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['CHAN'][0]['data'], 0, 4));
                    switch ($ChannelsIndex) {
                        case 6: // Stereo
                            $thisfile_audio['channels'] = 2;
                            break;

                        case 2: // Left channel only
                        case 4: // Right channel only
                            $thisfile_audio['channels'] = 1;
                            break;

                        default:
                            $info['warning'][] = 'Unexpected value in 8SVX.CHAN chunk - expecting 2 or 4 or 6, found "'.$ChannelsIndex.'"';
                            break;
                    }
                }

                $CommentsChunkNames = array('NAME' => 'title', 'author' => 'artist', '(c) ' => 'copyright', 'ANNO' => 'comment');
                foreach ($CommentsChunkNames as $key => $value) {
                    if (isset($thisfile_riff[$RIFFsubtype][$key][0]['data'])) {
                        $thisfile_riff['comments'][$value][] = $thisfile_riff[$RIFFsubtype][$key][0]['data'];
                    }
                }

                $thisfile_audio['bitrate'] = $thisfile_audio['sample_rate'] * $ActualBitsPerSample * $thisfile_audio['channels'];
                if (!empty($thisfile_audio['bitrate'])) {
                    $info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) / ($thisfile_audio['bitrate'] / 8);
                }
                break;

            case 'CDXA':
                $info['mime_type'] = 'video/mpeg';
                if (!empty($thisfile_riff['CDXA']['data'][0]['size'])) {
                    if (class_exists('GetId3\Module\AudioVideo\Mpeg')) {
                        $getid3_temp = new GetId3Core();
                        $getid3_temp->openfile($this->getid3->filename);
                        $getid3_mpeg = new Mpeg($getid3_temp);
                        $getid3_mpeg->analyze();
                        if (empty($getid3_temp->info['error'])) {
                            $info['audio'] = $getid3_temp->info['audio'];
                            $info['video'] = $getid3_temp->info['video'];
                            $info['mpeg'] = $getid3_temp->info['mpeg'];
                            $info['warning'] = $getid3_temp->info['warning'];
                        }
                        unset($getid3_temp, $getid3_mpeg);
                    }
                }
                break;

            default:
                $info['error'][] = 'Unknown RIFF type: expecting one of (WAVE|RMP3|AVI |CDDA|AIFF|AIFC|8SVX|CDXA), found "'.$RIFFsubtype.'" instead';
                unset($info['fileformat']);
                break;
        }

        switch ($RIFFsubtype) {
            case 'WAVE':
            case 'AIFF':
            case 'AIFC':
                if (isset($thisfile_riff[$RIFFsubtype]['ID3 ']) && !array_key_exists('id3 ', $thisfile_riff[$RIFFsubtype])) {
                    $info['warning'][] = 'mapping "ID3 " chunk to "id3 "';
                }
                if (isset($thisfile_riff[$RIFFsubtype]['tag ']) && !array_key_exists('id3 ', $thisfile_riff[$RIFFsubtype])) {
                    $info['warning'][] = 'mapping "tag " chunk to "id3 "';
                }
                if (isset($thisfile_riff[$RIFFsubtype]['id3 '])) {
                    $getid3_temp = new GetId3Core();
                    $getid3_temp->openfile($this->getid3->filename);
                    $getid3_id3v2 = new Id3v2($getid3_temp);
                    $getid3_id3v2->StartingOffset = $thisfile_riff[$RIFFsubtype]['id3 '][0]['offset'] + 8;
                    if ($thisfile_riff[$RIFFsubtype]['id3 '][0]['valid'] = $getid3_id3v2->analyze()) {
                        $info['id3v2'] = $getid3_temp->info['id3v2'];
                    }
                    unset($getid3_temp, $getid3_id3v2);
                }
                break;
        }

        if (isset($thisfile_riff_raw['fmt ']['wFormatTag']) && ($thisfile_riff_raw['fmt ']['wFormatTag'] == 1)) {
            // http://www.mega-nerd.com/erikd/Blog/Windiots/dts.html
            fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
            $FirstFourBytes = fread($this->getid3->fp, 4);
            if (preg_match('/^\xFF\x1F\x00\xE8/s', $FirstFourBytes)) {
                // DTSWAV
                $thisfile_audio_dataformat = 'dts';
            } elseif (preg_match('/^\x7F\xFF\x80\x01/s', $FirstFourBytes)) {
                // DTS, but this probably shouldn't happen
                $thisfile_audio_dataformat = 'dts';
            }
        }

        if (isset($thisfile_riff_WAVE['DISP']) && is_array($thisfile_riff_WAVE['DISP'])) {
            $thisfile_riff['comments']['title'][] = trim(substr($thisfile_riff_WAVE['DISP'][count($thisfile_riff_WAVE['DISP']) - 1]['data'], 4));
        }
        if (isset($thisfile_riff_WAVE['INFO']) && is_array($thisfile_riff_WAVE['INFO'])) {
            $this->RIFFcommentsParse($thisfile_riff_WAVE['INFO'], $thisfile_riff['comments']);
        }
        if (isset($thisfile_riff['AVI ']['INFO']) && is_array($thisfile_riff['AVI ']['INFO'])) {
            $this->RIFFcommentsParse($thisfile_riff['AVI ']['INFO'], $thisfile_riff['comments']);
        }

        if (empty($thisfile_audio['encoder']) && !empty($info['mpeg']['audio']['LAME']['short_version'])) {
            $thisfile_audio['encoder'] = $info['mpeg']['audio']['LAME']['short_version'];
        }

        if (!isset($info['playtime_seconds'])) {
            $info['playtime_seconds'] = 0;
        }
        if (isset($thisfile_riff_raw['strh'][0]['dwLength']) && isset($thisfile_riff_raw['avih']['dwMicroSecPerFrame'])) {
            // needed for >2GB AVIs where 'avih' chunk only lists number of frames in that chunk, not entire movie
            $info['playtime_seconds'] = $thisfile_riff_raw['strh'][0]['dwLength'] * ($thisfile_riff_raw['avih']['dwMicroSecPerFrame'] / 1000000);
        } elseif (isset($thisfile_riff_raw['avih']['dwTotalFrames']) && isset($thisfile_riff_raw['avih']['dwMicroSecPerFrame'])) {
            $info['playtime_seconds'] = $thisfile_riff_raw['avih']['dwTotalFrames'] * ($thisfile_riff_raw['avih']['dwMicroSecPerFrame'] / 1000000);
        }

        if ($info['playtime_seconds'] > 0) {
            if (isset($thisfile_riff_audio) && isset($thisfile_riff_video)) {
                if (!isset($info['bitrate'])) {
                    $info['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
                }
            } elseif (isset($thisfile_riff_audio) && !isset($thisfile_riff_video)) {
                if (!isset($thisfile_audio['bitrate'])) {
                    $thisfile_audio['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
                }
            } elseif (!isset($thisfile_riff_audio) && isset($thisfile_riff_video)) {
                if (!isset($thisfile_video['bitrate'])) {
                    $thisfile_video['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
                }
            }
        }

        if (isset($thisfile_riff_video) && isset($thisfile_audio['bitrate']) && ($thisfile_audio['bitrate'] > 0) && ($info['playtime_seconds'] > 0)) {
            $info['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
            $thisfile_audio['bitrate'] = 0;
            $thisfile_video['bitrate'] = $info['bitrate'];
            foreach ($thisfile_riff_audio as $channelnumber => $audioinfoarray) {
                $thisfile_video['bitrate'] -= $audioinfoarray['bitrate'];
                $thisfile_audio['bitrate'] += $audioinfoarray['bitrate'];
            }
            if ($thisfile_video['bitrate'] <= 0) {
                unset($thisfile_video['bitrate']);
            }
            if ($thisfile_audio['bitrate'] <= 0) {
                unset($thisfile_audio['bitrate']);
            }
        }

        if (isset($info['mpeg']['audio'])) {
            $thisfile_audio_dataformat = 'mp'.$info['mpeg']['audio']['layer'];
            $thisfile_audio['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
            $thisfile_audio['channels'] = $info['mpeg']['audio']['channels'];
            $thisfile_audio['bitrate'] = $info['mpeg']['audio']['bitrate'];
            $thisfile_audio['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
            if (!empty($info['mpeg']['audio']['codec'])) {
                $thisfile_audio['codec'] = $info['mpeg']['audio']['codec'].' '.$thisfile_audio['codec'];
            }
            if (!empty($thisfile_audio['streams'])) {
                foreach ($thisfile_audio['streams'] as $streamnumber => $streamdata) {
                    if ($streamdata['dataformat'] == $thisfile_audio_dataformat) {
                        $thisfile_audio['streams'][$streamnumber]['sample_rate'] = $thisfile_audio['sample_rate'];
                        $thisfile_audio['streams'][$streamnumber]['channels'] = $thisfile_audio['channels'];
                        $thisfile_audio['streams'][$streamnumber]['bitrate'] = $thisfile_audio['bitrate'];
                        $thisfile_audio['streams'][$streamnumber]['bitrate_mode'] = $thisfile_audio['bitrate_mode'];
                        $thisfile_audio['streams'][$streamnumber]['codec'] = $thisfile_audio['codec'];
                    }
                }
            }
            $getid3_mp3 = new Mp3($this->getid3);
            $thisfile_audio['encoder_options'] = $getid3_mp3->GuessEncoderOptions();
            unset($getid3_mp3);
        }

        if (!empty($thisfile_riff_raw['fmt ']['wBitsPerSample']) && ($thisfile_riff_raw['fmt ']['wBitsPerSample'] > 0)) {
            switch ($thisfile_audio_dataformat) {
                case 'ac3':
                    // ignore bits_per_sample
                    break;

                default:
                    $thisfile_audio['bits_per_sample'] = $thisfile_riff_raw['fmt ']['wBitsPerSample'];
                    break;
            }
        }

        if (empty($thisfile_riff_raw)) {
            unset($thisfile_riff['raw']);
        }
        if (empty($thisfile_riff_audio)) {
            unset($thisfile_riff['audio']);
        }
        if (empty($thisfile_riff_video)) {
            unset($thisfile_riff['video']);
        }

        return true;
    }

    /**
     * @param  type    $RIFFinfoArray
     * @param  type    $CommentsTargetArray
     *
     * @return bool
     */
    public static function RIFFcommentsParse(&$RIFFinfoArray, &$CommentsTargetArray)
    {
        $RIFFinfoKeyLookup = array(
            'IARL' => 'archivallocation',
            'IART' => 'artist',
            'ICDS' => 'costumedesigner',
            'ICMS' => 'commissionedby',
            'ICMT' => 'comment',
            'ICNT' => 'country',
            'ICOP' => 'copyright',
            'ICRD' => 'creationdate',
            'IDIM' => 'dimensions',
            'IDIT' => 'digitizationdate',
            'IDPI' => 'resolution',
            'IDST' => 'distributor',
            'IEDT' => 'editor',
            'IENG' => 'engineers',
            'IFRM' => 'accountofparts',
            'IGNR' => 'genre',
            'IKEY' => 'keywords',
            'ILGT' => 'lightness',
            'ILNG' => 'language',
            'IMED' => 'orignalmedium',
            'IMUS' => 'composer',
            'INAM' => 'title',
            'IPDS' => 'productiondesigner',
            'IPLT' => 'palette',
            'IPRD' => 'product',
            'IPRO' => 'producer',
            'IPRT' => 'part',
            'IRTD' => 'rating',
            'ISBJ' => 'subject',
            'ISFT' => 'software',
            'ISGN' => 'secondarygenre',
            'ISHP' => 'sharpness',
            'ISRC' => 'sourcesupplier',
            'ISRF' => 'digitizationsource',
            'ISTD' => 'productionstudio',
            'ISTR' => 'starring',
            'ITCH' => 'encoded_by',
            'IWEB' => 'url',
            'IWRI' => 'writer',
        );
        foreach ($RIFFinfoKeyLookup as $key => $value) {
            if (isset($RIFFinfoArray[$key])) {
                foreach ($RIFFinfoArray[$key] as $commentid => $commentdata) {
                    if (trim($commentdata['data']) != '') {
                        if (isset($CommentsTargetArray[$value])) {
                            $CommentsTargetArray[$value][] = trim($commentdata['data']);
                        } else {
                            $CommentsTargetArray[$value] = array(trim($commentdata['data']));
                        }
                    }
                }
            }
        }

        return true;
    }

    /**
     * @param  type    $startoffset
     * @param  type    $maxoffset
     *
     * @return bool
     */
    public function ParseRIFF($startoffset, $maxoffset)
    {
        $info = &$this->getid3->info;

        $maxoffset = min($maxoffset, $info['avdataend']);

        $RIFFchunk = false;
        $FoundAllChunksWeNeed = false;

        if (($startoffset < 0) || !Helper::intValueSupported($startoffset)) {
            $info['warning'][] = 'Unable to ParseRIFF() at '.$startoffset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions';

            return false;
        }
        $max_usable_offset = min(PHP_INT_MAX - 1024, $maxoffset);
        if ($maxoffset > $max_usable_offset) {
            $info['warning'][] = 'ParseRIFF() may return incomplete data for chunk starting at '.$startoffset.' because beyond it extends to '.$maxoffset.', which is beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions';
        }
        fseek($this->getid3->fp, $startoffset, SEEK_SET);

        while (ftell($this->getid3->fp) < $max_usable_offset) {
            $chunknamesize = fread($this->getid3->fp, 8);
            $chunkname = substr($chunknamesize, 0, 4);
            $chunksize = $this->EitherEndian2Int(substr($chunknamesize, 4, 4));
            if (strlen($chunkname) < 4) {
                $info['error'][] = 'Expecting chunk name at offset '.(ftell($this->getid3->fp) - 4).' but found nothing. Aborting RIFF parsing.';
                break;
            }
            if ($chunksize == 0) {
                if ($chunkname == 'JUNK') {
                    // we'll allow zero-size JUNK frames
                } else {
                    $info['warning'][] = 'Chunk size at offset '.(ftell($this->getid3->fp) - 4).' is zero. Aborting RIFF parsing.';
                    break;
                }
            }
            if (($chunksize % 2) != 0) {
                // all structures are packed on word boundaries
                ++$chunksize;
            }

            switch ($chunkname) {
                case 'LIST':
                    $listname = fread($this->getid3->fp, 4);
                    if (preg_match('#^(movi|rec )$#i', $listname)) {
                        $RIFFchunk[$listname]['offset'] = ftell($this->getid3->fp) - 4;
                        $RIFFchunk[$listname]['size'] = $chunksize;

                        if ($FoundAllChunksWeNeed) {

                            // skip over
                        } else {
                            $WhereWeWere = ftell($this->getid3->fp);
                            $AudioChunkHeader = fread($this->getid3->fp, 12);
                            $AudioChunkStreamNum = substr($AudioChunkHeader, 0, 2);
                            $AudioChunkStreamType = substr($AudioChunkHeader, 2, 2);
                            $AudioChunkSize = Helper::LittleEndian2Int(substr($AudioChunkHeader, 4, 4));

                            if ($AudioChunkStreamType == 'wb') {
                                $FirstFourBytes = substr($AudioChunkHeader, 8, 4);
                                if (preg_match('/^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]/s', $FirstFourBytes)) {
                                    // MP3
                                    if (Mp3::MPEGaudioHeaderBytesValid($FirstFourBytes)) {
                                        $getid3_temp = new GetId3Core();
                                        $getid3_temp->openfile($this->getid3->filename);
                                        $getid3_temp->info['avdataoffset'] = ftell($this->getid3->fp) - 4;
                                        $getid3_temp->info['avdataend'] = ftell($this->getid3->fp) + $AudioChunkSize;
                                        $getid3_mp3 = new Mp3($getid3_temp);
                                        $getid3_mp3->getOnlyMPEGaudioInfo($getid3_temp->info['avdataoffset'], false);
                                        if (isset($getid3_temp->info['mpeg']['audio'])) {
                                            $info['mpeg']['audio'] = $getid3_temp->info['mpeg']['audio'];
                                            $info['audio'] = $getid3_temp->info['audio'];
                                            $info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer'];
                                            $info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
                                            $info['audio']['channels'] = $info['mpeg']['audio']['channels'];
                                            $info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
                                            $info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
                                            //$info['bitrate']               = $info['audio']['bitrate'];
                                        }
                                        unset($getid3_temp, $getid3_mp3);
                                    }
                                } elseif (preg_match('/^\x0B\x77/s', $FirstFourBytes)) {

                                    // AC3
                                    if (class_exists('GetId3\\Module\\Audio\\Ac3')) {
                                        $getid3_temp = new GetId3Core();
                                        $getid3_temp->openfile($this->getid3->filename);
                                        $getid3_temp->info['avdataoffset'] = ftell($this->getid3->fp) - 4;
                                        $getid3_temp->info['avdataend'] = ftell($this->getid3->fp) + $AudioChunkSize;
                                        $getid3_ac3 = new Ac3($getid3_temp);
                                        $getid3_ac3->analyze();
                                        if (empty($getid3_temp->info['error'])) {
                                            $info['audio'] = $getid3_temp->info['audio'];
                                            $info['ac3'] = $getid3_temp->info['ac3'];
                                            if (!empty($getid3_temp->info['warning'])) {
                                                foreach ($getid3_temp->info['warning'] as $key => $value) {
                                                    $info['warning'][] = $value;
                                                }
                                            }
                                        }
                                        unset($getid3_temp, $getid3_ac3);
                                    }
                                }
                            }

                            $FoundAllChunksWeNeed = true;
                            fseek($this->getid3->fp, $WhereWeWere, SEEK_SET);
                        }
                        fseek($this->getid3->fp, $chunksize - 4, SEEK_CUR);

                    //} elseif (preg_match('#^[0-9]{2}(wb|pc|dc|db)$#i', $listname)) {
                    //
                    //	// data chunk, ignore
                    //
                    } else {
                        if (!isset($RIFFchunk[$listname])) {
                            $RIFFchunk[$listname] = array();
                        }
                        $LISTchunkParent = $listname;
                        $LISTchunkMaxOffset = ftell($this->getid3->fp) - 4 + $chunksize;
                        if ($parsedChunk = $this->ParseRIFF(ftell($this->getid3->fp), ftell($this->getid3->fp) + $chunksize - 4)) {
                            $RIFFchunk[$listname] = array_merge_recursive($RIFFchunk[$listname], $parsedChunk);
                        }
                    }
                    break;

                default:
                    if (preg_match('#^[0-9]{2}(wb|pc|dc|db)$#', $chunkname)) {
                        $nextoffset = ftell($this->getid3->fp) + $chunksize;
                        if (($nextoffset < 0) || !Helper::intValueSupported($nextoffset)) {
                            $info['warning'][] = 'Unable to parse chunk at offset '.$nextoffset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions';
                            break 2;
                        }
                        fseek($this->getid3->fp, $nextoffset, SEEK_SET);
                        break;
                    }
                    $thisindex = 0;
                    if (isset($RIFFchunk[$chunkname]) && is_array($RIFFchunk[$chunkname])) {
                        $thisindex = count($RIFFchunk[$chunkname]);
                    }
                    $RIFFchunk[$chunkname][$thisindex]['offset'] = ftell($this->getid3->fp) - 8;
                    $RIFFchunk[$chunkname][$thisindex]['size'] = $chunksize;
                    switch ($chunkname) {
                        case 'data':
                            $info['avdataoffset'] = ftell($this->getid3->fp);
                            $info['avdataend'] = $info['avdataoffset'] + $chunksize;

                            $RIFFdataChunkContentsTest = fread($this->getid3->fp, 36);

                            if ((strlen($RIFFdataChunkContentsTest) > 0) && preg_match('/^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]/s', substr($RIFFdataChunkContentsTest, 0, 4))) {

                                // Probably is MP3 data
                                if (Mp3::MPEGaudioHeaderBytesValid(substr($RIFFdataChunkContentsTest, 0, 4))) {
                                    $getid3_temp = new GetId3Core();
                                    $getid3_temp->openfile($this->getid3->filename);
                                    $getid3_temp->info['avdataoffset'] = $RIFFchunk[$chunkname][$thisindex]['offset'];
                                    $getid3_temp->info['avdataend'] = $RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size'];
                                    $getid3_mp3 = new Mp3($getid3_temp);
                                    $getid3_mp3->getOnlyMPEGaudioInfo($RIFFchunk[$chunkname][$thisindex]['offset'], false);
                                    if (empty($getid3_temp->info['error'])) {
                                        $info['mpeg'] = $getid3_temp->info['mpeg'];
                                        $info['audio'] = $getid3_temp->info['audio'];
                                    }
                                    unset($getid3_temp, $getid3_mp3);
                                }
                            } elseif ((strlen($RIFFdataChunkContentsTest) > 0) && (substr($RIFFdataChunkContentsTest, 0, 2) == "\x0B\x77")) {

                                // This is probably AC-3 data
                                if (class_exists('GetId3\\Module\\Audio\\Ac3')) {
                                    $getid3_temp = new GetId3Core();
                                    $getid3_temp->openfile($this->getid3->filename);
                                    $getid3_temp->info['avdataoffset'] = $RIFFchunk[$chunkname][$thisindex]['offset'];
                                    $getid3_temp->info['avdataend'] = $RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size'];
                                    $getid3_ac3 = new Ac3($getid3_temp);
                                    $getid3_ac3->analyze();
                                    if (empty($getid3_temp->info['error'])) {
                                        $info['audio'] = $getid3_temp->info['audio'];
                                        $info['ac3'] = $getid3_temp->info['ac3'];
                                        $info['warning'] = $getid3_temp->info['warning'];
                                    }
                                    unset($getid3_temp, $getid3_ac3);
                                }
                            } elseif ((strlen($RIFFdataChunkContentsTest) > 0) && (substr($RIFFdataChunkContentsTest, 8, 2) == "\x77\x0B")) {

                                // Dolby Digital WAV
                                // AC-3 content, but not encoded in same format as normal AC-3 file
                                // For one thing, byte order is swapped

                                if (class_exists('GetId3\\Module\\Audio\\Ac3')) {
                                    // ok to use tmpfile here - only 56 bytes
                                    if ($RIFFtempfilename = tempnam(GetId3Core::getTempDir(), 'id3')) {
                                        if ($fd_temp = fopen($RIFFtempfilename, 'wb')) {
                                            for ($i = 0; $i < 28; $i += 2) {
                                                // swap byte order
                                                fwrite($fd_temp, substr($RIFFdataChunkContentsTest, 8 + $i + 1, 1));
                                                fwrite($fd_temp, substr($RIFFdataChunkContentsTest, 8 + $i + 0, 1));
                                            }
                                            fclose($fd_temp);

                                            $getid3_temp = new GetId3Core();
                                            $getid3_temp->openfile($RIFFtempfilename);
                                            $getid3_temp->info['avdataend'] = 20;
                                            $getid3_ac3 = new Ac3($getid3_temp);
                                            $getid3_ac3->analyze();
                                            if (empty($getid3_temp->info['error'])) {
                                                $info['audio'] = $getid3_temp->info['audio'];
                                                $info['ac3'] = $getid3_temp->info['ac3'];
                                                $info['warning'] = $getid3_temp->info['warning'];
                                            } else {
                                                $info['error'][] = 'Error parsing Dolby Digital WAV (AC3-in-RIFF): '.implode(';', $getid3_temp->info['error']);
                                            }
                                            unset($getid3_ac3, $getid3_temp);
                                        } else {
                                            $info['error'][] = 'Error parsing Dolby Digital WAV (AC3-in-RIFF): failed to write temp file';
                                        }
                                        unlink($RIFFtempfilename);
                                    } else {
                                        $info['error'][] = 'Error parsing Dolby Digital WAV (AC3-in-RIFF): failed to write temp file';
                                    }
                                }
                            } elseif ((strlen($RIFFdataChunkContentsTest) > 0) && (substr($RIFFdataChunkContentsTest, 0, 4) == 'wvpk')) {

                                // This is WavPack data
                                $info['wavpack']['offset'] = $RIFFchunk[$chunkname][$thisindex]['offset'];
                                $info['wavpack']['size'] = Helper::LittleEndian2Int(substr($RIFFdataChunkContentsTest, 4, 4));
                                $this->RIFFparseWavPackHeader(substr($RIFFdataChunkContentsTest, 8, 28));
                            } else {

                                // This is some other kind of data (quite possibly just PCM)
                                // do nothing special, just skip it
                            }
                            $nextoffset = $RIFFchunk[$chunkname][$thisindex]['offset'] + 8 + $chunksize;
                            if (($nextoffset < 0) || !Helper::intValueSupported($nextoffset)) {
                                $info['warning'][] = 'Unable to parse chunk at offset '.$nextoffset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions';
                                break 3;
                            }
                            fseek($this->getid3->fp, $RIFFchunk[$chunkname][$thisindex]['offset'] + 8 + $chunksize, SEEK_SET);
                            break;

                        case 'iXML':
                        case 'bext':
                        case 'cart':
                        case 'fmt ':
                        case 'strh':
                        case 'strf':
                        case 'indx':
                        case 'MEXT':
                        case 'DISP':
                            // always read data in
                        case 'JUNK':
                            // should be: never read data in
                            // but some programs write their version strings in a JUNK chunk (e.g. VirtualDub, AVIdemux, etc)
                            if ($chunksize < 1048576) {
                                if ($chunksize > 0) {
                                    $RIFFchunk[$chunkname][$thisindex]['data'] = fread($this->getid3->fp, $chunksize);
                                    if ($chunkname == 'JUNK') {
                                        if (preg_match('#^([\\x20-\\x7F]+)#', $RIFFchunk[$chunkname][$thisindex]['data'], $matches)) {
                                            // only keep text characters [chr(32)-chr(127)]
                                            $info['riff']['comments']['junk'][] = trim($matches[1]);
                                        }
                                        // but if nothing there, ignore
                                        // remove the key in either case
                                        unset($RIFFchunk[$chunkname][$thisindex]['data']);
                                    }
                                }
                            } else {
                                $info['warning'][] = 'chunk "'.$chunkname.'" at offset '.ftell($this->getid3->fp).' is unexpectedly larger than 1MB (claims to be '.number_format($chunksize).' bytes), skipping data';
                                $nextoffset = ftell($this->getid3->fp) + $chunksize;
                                if (($nextoffset < 0) || !Helper::intValueSupported($nextoffset)) {
                                    $info['warning'][] = 'Unable to parse chunk at offset '.$nextoffset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions';
                                    break 3;
                                }
                                fseek($this->getid3->fp, $nextoffset, SEEK_SET);
                            }
                            break;

                        default:
                            if (!preg_match('#^[0-9]{2}(wb|pc|dc|db)$#', $chunkname) && !empty($LISTchunkParent) && (($RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size']) <= $LISTchunkMaxOffset)) {
                                $RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['offset'] = $RIFFchunk[$chunkname][$thisindex]['offset'];
                                $RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['size'] = $RIFFchunk[$chunkname][$thisindex]['size'];
                                unset($RIFFchunk[$chunkname][$thisindex]['offset']);
                                unset($RIFFchunk[$chunkname][$thisindex]['size']);
                                if (isset($RIFFchunk[$chunkname][$thisindex]) && empty($RIFFchunk[$chunkname][$thisindex])) {
                                    unset($RIFFchunk[$chunkname][$thisindex]);
                                }
                                if (isset($RIFFchunk[$chunkname]) && empty($RIFFchunk[$chunkname])) {
                                    unset($RIFFchunk[$chunkname]);
                                }
                                $RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['data'] = fread($this->getid3->fp, $chunksize);
                            //} elseif (in_array($chunkname, array('ID3 ')) || (($chunksize > 0) && ($chunksize < 2048))) {
                            } elseif (($chunksize > 0) && ($chunksize < 2048)) {
                                // only read data in if smaller than 2kB
                                $RIFFchunk[$chunkname][$thisindex]['data'] = fread($this->getid3->fp, $chunksize);
                            } else {
                                $nextoffset = ftell($this->getid3->fp) + $chunksize;
                                if (($nextoffset < 0) || !Helper::intValueSupported($nextoffset)) {
                                    $info['warning'][] = 'Unable to parse chunk at offset '.$nextoffset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions';
                                    break 3;
                                }
                                fseek($this->getid3->fp, $nextoffset, SEEK_SET);
                            }
                            break;
                    }
                    break;

            }
        }

        return $RIFFchunk;
    }

    /**
     * @param  type    $RIFFdata
     *
     * @return bool
     */
    public function ParseRIFFdata(&$RIFFdata)
    {
        $info = &$this->getid3->info;
        if ($RIFFdata) {
            $tempfile = tempnam(GetId3Core::getTempDir(), 'getID3');
            $fp_temp = fopen($tempfile, 'wb');
            $RIFFdataLength = strlen($RIFFdata);
            $NewLengthString = Helper::LittleEndian2String($RIFFdataLength, 4);
            for ($i = 0; $i < 4; ++$i) {
                $RIFFdata{$i + 4}
                = $NewLengthString{$i};
            }
            fwrite($fp_temp, $RIFFdata);
            fclose($fp_temp);

            $getid3_temp = new GetId3Core();
            $getid3_temp->openfile($tempfile);
            $getid3_temp->info['filesize'] = $RIFFdataLength;
            $getid3_temp->info['filenamepath'] = $info['filenamepath'];
            $getid3_temp->info['tags'] = $info['tags'];
            $getid3_temp->info['warning'] = $info['warning'];
            $getid3_temp->info['error'] = $info['error'];
            $getid3_temp->info['comments'] = $info['comments'];
            $getid3_temp->info['audio'] = (isset($info['audio']) ? $info['audio'] : array());
            $getid3_temp->info['video'] = (isset($info['video']) ? $info['video'] : array());
            $getid3_riff = new self($getid3_temp);
            $getid3_riff->analyze();

            $info['riff'] = $getid3_temp->info['riff'];
            $info['warning'] = $getid3_temp->info['warning'];
            $info['error'] = $getid3_temp->info['error'];
            $info['tags'] = $getid3_temp->info['tags'];
            $info['comments'] = $getid3_temp->info['comments'];
            unset($getid3_riff, $getid3_temp);
            unlink($tempfile);
        }

        return false;
    }

    /**
     * @param  type $WaveFormatExData
     *
     * @return type
     */
    public static function RIFFparseWAVEFORMATex($WaveFormatExData)
    {
        // shortcut
        $WaveFormatEx['raw'] = array();
        $WaveFormatEx_raw = &$WaveFormatEx['raw'];

        $WaveFormatEx_raw['wFormatTag'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 0, 2));
        $WaveFormatEx_raw['nChannels'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 2, 2));
        $WaveFormatEx_raw['nSamplesPerSec'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 4, 4));
        $WaveFormatEx_raw['nAvgBytesPerSec'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 8, 4));
        $WaveFormatEx_raw['nBlockAlign'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 12, 2));
        $WaveFormatEx_raw['wBitsPerSample'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 14, 2));
        if (strlen($WaveFormatExData) > 16) {
            $WaveFormatEx_raw['cbSize'] = Helper::LittleEndian2Int(substr($WaveFormatExData, 16, 2));
        }

        $WaveFormatEx['codec'] = self::RIFFwFormatTagLookup($WaveFormatEx_raw['wFormatTag']);
        $WaveFormatEx['channels'] = $WaveFormatEx_raw['nChannels'];
        $WaveFormatEx['sample_rate'] = $WaveFormatEx_raw['nSamplesPerSec'];
        $WaveFormatEx['bitrate'] = $WaveFormatEx_raw['nAvgBytesPerSec'] * 8;
        $WaveFormatEx['bits_per_sample'] = $WaveFormatEx_raw['wBitsPerSample'];

        return $WaveFormatEx;
    }

    /**
     * @param  type    $WavPackChunkData
     *
     * @return bool
     */
    public function RIFFparseWavPackHeader($WavPackChunkData)
    {
        // typedef struct {
        //     char ckID [4];
        //     long ckSize;
        //     short version;
        //     short bits;                // added for version 2.00
        //     short flags, shift;        // added for version 3.00
        //     long total_samples, crc, crc2;
        //     char extension [4], extra_bc, extras [3];
        // } WavpackHeader;

        // shortcut
        $info = &$this->getid3->info;
        $info['wavpack'] = array();
        $thisfile_wavpack = &$info['wavpack'];

        $thisfile_wavpack['version'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 0, 2));
        if ($thisfile_wavpack['version'] >= 2) {
            $thisfile_wavpack['bits'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 2, 2));
        }
        if ($thisfile_wavpack['version'] >= 3) {
            $thisfile_wavpack['flags_raw'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 4, 2));
            $thisfile_wavpack['shift'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 6, 2));
            $thisfile_wavpack['total_samples'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 8, 4));
            $thisfile_wavpack['crc1'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 12, 4));
            $thisfile_wavpack['crc2'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 16, 4));
            $thisfile_wavpack['extension'] = substr($WavPackChunkData, 20, 4);
            $thisfile_wavpack['extra_bc'] = Helper::LittleEndian2Int(substr($WavPackChunkData, 24, 1));
            for ($i = 0; $i <= 2; ++$i) {
                $thisfile_wavpack['extras'][] = Helper::LittleEndian2Int(substr($WavPackChunkData, 25 + $i, 1));
            }

            // shortcut
            $thisfile_wavpack['flags'] = array();
            $thisfile_wavpack_flags = &$thisfile_wavpack['flags'];

            $thisfile_wavpack_flags['mono'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000001);
            $thisfile_wavpack_flags['fast_mode'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000002);
            $thisfile_wavpack_flags['raw_mode'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000004);
            $thisfile_wavpack_flags['calc_noise'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000008);
            $thisfile_wavpack_flags['high_quality'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000010);
            $thisfile_wavpack_flags['3_byte_samples'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000020);
            $thisfile_wavpack_flags['over_20_bits'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000040);
            $thisfile_wavpack_flags['use_wvc'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000080);
            $thisfile_wavpack_flags['noiseshaping'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000100);
            $thisfile_wavpack_flags['very_fast_mode'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000200);
            $thisfile_wavpack_flags['new_high_quality'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000400);
            $thisfile_wavpack_flags['cancel_extreme'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x000800);
            $thisfile_wavpack_flags['cross_decorrelation'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x001000);
            $thisfile_wavpack_flags['new_decorrelation'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x002000);
            $thisfile_wavpack_flags['joint_stereo'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x004000);
            $thisfile_wavpack_flags['extra_decorrelation'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x008000);
            $thisfile_wavpack_flags['override_noiseshape'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x010000);
            $thisfile_wavpack_flags['override_jointstereo'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x020000);
            $thisfile_wavpack_flags['copy_source_filetime'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x040000);
            $thisfile_wavpack_flags['create_exe'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x080000);
        }

        return true;
    }

    /**
     * @param  type $BITMAPINFOHEADER
     * @param  type $littleEndian
     *
     * @return type
     */
    public static function ParseBITMAPINFOHEADER($BITMAPINFOHEADER, $littleEndian = true)
    {
        $functionname = ($littleEndian ? 'LittleEndian2Int' : 'BigEndian2Int');
        $parsed['biSize'] = Helper::$functionname(substr($BITMAPINFOHEADER, 0, 4)); // number of bytes required by the BITMAPINFOHEADER structure
        $parsed['biWidth'] = Helper::$functionname(substr($BITMAPINFOHEADER, 4, 4)); // width of the bitmap in pixels
        $parsed['biHeight'] = Helper::$functionname(substr($BITMAPINFOHEADER, 8, 4)); // height of the bitmap in pixels. If biHeight is positive, the bitmap is a 'bottom-up' DIB and its origin is the lower left corner. If biHeight is negative, the bitmap is a 'top-down' DIB and its origin is the upper left corner
        $parsed['biPlanes'] = Helper::$functionname(substr($BITMAPINFOHEADER, 12, 2)); // number of color planes on the target device. In most cases this value must be set to 1
        $parsed['biBitCount'] = Helper::$functionname(substr($BITMAPINFOHEADER, 14, 2)); // Specifies the number of bits per pixels
        $parsed['fourcc'] = substr($BITMAPINFOHEADER, 16, 4);  // compression identifier
        $parsed['biSizeImage'] = Helper::$functionname(substr($BITMAPINFOHEADER, 20, 4)); // size of the bitmap data section of the image (the actual pixel data, excluding BITMAPINFOHEADER and RGBQUAD structures)
        $parsed['biXPelsPerMeter'] = Helper::$functionname(substr($BITMAPINFOHEADER, 24, 4)); // horizontal resolution, in pixels per metre, of the target device
        $parsed['biYPelsPerMeter'] = Helper::$functionname(substr($BITMAPINFOHEADER, 28, 4)); // vertical resolution, in pixels per metre, of the target device
        $parsed['biClrUsed'] = Helper::$functionname(substr($BITMAPINFOHEADER, 32, 4)); // actual number of color indices in the color table used by the bitmap. If this value is zero, the bitmap uses the maximum number of colors corresponding to the value of the biBitCount member for the compression mode specified by biCompression
        $parsed['biClrImportant'] = Helper::$functionname(substr($BITMAPINFOHEADER, 36, 4)); // number of color indices that are considered important for displaying the bitmap. If this value is zero, all colors are important

        return $parsed;
    }

    /**
     * @staticvar array $DIVXTAGgenre
     * @staticvar array $DIVXTAGrating
     *
     * @param  type $DIVXTAG
     *
     * @return type
     */
    public static function ParseDIVXTAG($DIVXTAG)
    {
        // structure from "IDivX" source, Form1.frm, by "Greg Frazier of Daemonic Software Group", email: gfrazier@icestorm.net, web: http://dsg.cjb.net/
        // source available at http://files.divx-digest.com/download/c663efe7ef8ad2e90bf4af4d3ea6188a/on0SWN2r/edit/IDivX.zip
        // 'Byte Layout:                   '1111111111111111
        // '32 for Movie - 1               '1111111111111111
        // '28 for Author - 6              '6666666666666666
        // '4  for year - 2                '6666666666662222
        // '3  for genre - 3               '7777777777777777
        // '48 for Comments - 7            '7777777777777777
        // '1  for Rating - 4              '7777777777777777
        // '5  for Future Additions - 0    '333400000DIVXTAG
        // '128 bytes total

        static $DIVXTAGgenre = array(
             0 => 'Action',
             1 => 'Action/Adventure',
             2 => 'Adventure',
             3 => 'Adult',
             4 => 'Anime',
             5 => 'Cartoon',
             6 => 'Claymation',
             7 => 'Comedy',
             8 => 'Commercial',
             9 => 'Documentary',
            10 => 'Drama',
            11 => 'Home Video',
            12 => 'Horror',
            13 => 'Infomercial',
            14 => 'Interactive',
            15 => 'Mystery',
            16 => 'Music Video',
            17 => 'Other',
            18 => 'Religion',
            19 => 'Sci Fi',
            20 => 'Thriller',
            21 => 'Western',
        );
        static $DIVXTAGrating = array(
            0 => 'Unrated',
            1 => 'G',
            2 => 'PG',
            3 => 'PG-13',
            4 => 'R',
            5 => 'NC-17',
        );

        $parsed['title'] = trim(substr($DIVXTAG, 0, 32));
        $parsed['artist'] = trim(substr($DIVXTAG, 32, 28));
        $parsed['year'] = intval(trim(substr($DIVXTAG, 60, 4)));
        $parsed['comment'] = trim(substr($DIVXTAG, 64, 48));
        $parsed['genre_id'] = intval(trim(substr($DIVXTAG, 112, 3)));
        $parsed['rating_id'] = ord(substr($DIVXTAG, 115, 1));
        //$parsed['padding'] =             substr($DIVXTAG, 116,  5);  // 5-byte null
        //$parsed['magic']   =             substr($DIVXTAG, 121,  7);  // "DIVXTAG"

        $parsed['genre'] = (isset($DIVXTAGgenre[$parsed['genre_id']])   ? $DIVXTAGgenre[$parsed['genre_id']]   : $parsed['genre_id']);
        $parsed['rating'] = (isset($DIVXTAGrating[$parsed['rating_id']]) ? $DIVXTAGrating[$parsed['rating_id']] : $parsed['rating_id']);

        return $parsed;
    }

    /**
     * @param  type $tagshortname
     *
     * @return type
     */
    public static function RIFFwaveSNDMtagLookup($tagshortname)
    {
        $begin = __LINE__;

        /* This is not a comment!

            ©kwd	keywords
            ©BPM	bpm
            ©trt	tracktitle
            ©des	description
            ©gen	category
            ©fin	featuredinstrument
            ©LID	longid
            ©bex	bwdescription
            ©pub	publisher
            ©cdt	cdtitle
            ©alb	library
            ©com	composer

        */

        return Helper::EmbeddedLookup($tagshortname, $begin, __LINE__, __FILE__, 'riff-sndm');
    }

    /**
     * @param  type $wFormatTag
     *
     * @return type
     */
    public static function RIFFwFormatTagLookup($wFormatTag)
    {
        $begin = __LINE__;

        /* This is not a comment!

            0x0000	Microsoft Unknown Wave Format
            0x0001	Pulse Code Modulation (PCM)
            0x0002	Microsoft ADPCM
            0x0003	IEEE Float
            0x0004	Compaq Computer VSELP
            0x0005	IBM CVSD
            0x0006	Microsoft A-Law
            0x0007	Microsoft mu-Law
            0x0008	Microsoft DTS
            0x0010	OKI ADPCM
            0x0011	Intel DVI/IMA ADPCM
            0x0012	Videologic MediaSpace ADPCM
            0x0013	Sierra Semiconductor ADPCM
            0x0014	Antex Electronics G.723 ADPCM
            0x0015	DSP Solutions DigiSTD
            0x0016	DSP Solutions DigiFIX
            0x0017	Dialogic OKI ADPCM
            0x0018	MediaVision ADPCM
            0x0019	Hewlett-Packard CU
            0x0020	Yamaha ADPCM
            0x0021	Speech Compression Sonarc
            0x0022	DSP Group TrueSpeech
            0x0023	Echo Speech EchoSC1
            0x0024	Audiofile AF36
            0x0025	Audio Processing Technology APTX
            0x0026	AudioFile AF10
            0x0027	Prosody 1612
            0x0028	LRC
            0x0030	Dolby AC2
            0x0031	Microsoft GSM 6.10
            0x0032	MSNAudio
            0x0033	Antex Electronics ADPCME
            0x0034	Control Resources VQLPC
            0x0035	DSP Solutions DigiREAL
            0x0036	DSP Solutions DigiADPCM
            0x0037	Control Resources CR10
            0x0038	Natural MicroSystems VBXADPCM
            0x0039	Crystal Semiconductor IMA ADPCM
            0x003A	EchoSC3
            0x003B	Rockwell ADPCM
            0x003C	Rockwell Digit LK
            0x003D	Xebec
            0x0040	Antex Electronics G.721 ADPCM
            0x0041	G.728 CELP
            0x0042	MSG723
            0x0050	MPEG Layer-2 or Layer-1
            0x0052	RT24
            0x0053	PAC
            0x0055	MPEG Layer-3
            0x0059	Lucent G.723
            0x0060	Cirrus
            0x0061	ESPCM
            0x0062	Voxware
            0x0063	Canopus Atrac
            0x0064	G.726 ADPCM
            0x0065	G.722 ADPCM
            0x0066	DSAT
            0x0067	DSAT Display
            0x0069	Voxware Byte Aligned
            0x0070	Voxware AC8
            0x0071	Voxware AC10
            0x0072	Voxware AC16
            0x0073	Voxware AC20
            0x0074	Voxware MetaVoice
            0x0075	Voxware MetaSound
            0x0076	Voxware RT29HW
            0x0077	Voxware VR12
            0x0078	Voxware VR18
            0x0079	Voxware TQ40
            0x0080	Softsound
            0x0081	Voxware TQ60
            0x0082	MSRT24
            0x0083	G.729A
            0x0084	MVI MV12
            0x0085	DF G.726
            0x0086	DF GSM610
            0x0088	ISIAudio
            0x0089	Onlive
            0x0091	SBC24
            0x0092	Dolby AC3 SPDIF
            0x0093	MediaSonic G.723
            0x0094	Aculab PLC    Prosody 8kbps
            0x0097	ZyXEL ADPCM
            0x0098	Philips LPCBB
            0x0099	Packed
            0x00FF	AAC
            0x0100	Rhetorex ADPCM
            0x0101	IBM mu-law
            0x0102	IBM A-law
            0x0103	IBM AVC Adaptive Differential Pulse Code Modulation (ADPCM)
            0x0111	Vivo G.723
            0x0112	Vivo Siren
            0x0123	Digital G.723
            0x0125	Sanyo LD ADPCM
            0x0130	Sipro Lab Telecom ACELP NET
            0x0131	Sipro Lab Telecom ACELP 4800
            0x0132	Sipro Lab Telecom ACELP 8V3
            0x0133	Sipro Lab Telecom G.729
            0x0134	Sipro Lab Telecom G.729A
            0x0135	Sipro Lab Telecom Kelvin
            0x0140	Windows Media Video V8
            0x0150	Qualcomm PureVoice
            0x0151	Qualcomm HalfRate
            0x0155	Ring Zero Systems TUB GSM
            0x0160	Microsoft Audio 1
            0x0161	Windows Media Audio V7 / V8 / V9
            0x0162	Windows Media Audio Professional V9
            0x0163	Windows Media Audio Lossless V9
            0x0200	Creative Labs ADPCM
            0x0202	Creative Labs Fastspeech8
            0x0203	Creative Labs Fastspeech10
            0x0210	UHER Informatic GmbH ADPCM
            0x0220	Quarterdeck
            0x0230	I-link Worldwide VC
            0x0240	Aureal RAW Sport
            0x0250	Interactive Products HSX
            0x0251	Interactive Products RPELP
            0x0260	Consistent Software CS2
            0x0270	Sony SCX
            0x0300	Fujitsu FM Towns Snd
            0x0400	BTV Digital
            0x0401	Intel Music Coder
            0x0450	QDesign Music
            0x0680	VME VMPCM
            0x0681	AT&T Labs TPC
            0x08AE	ClearJump LiteWave
            0x1000	Olivetti GSM
            0x1001	Olivetti ADPCM
            0x1002	Olivetti CELP
            0x1003	Olivetti SBC
            0x1004	Olivetti OPR
            0x1100	Lernout & Hauspie Codec (0x1100)
            0x1101	Lernout & Hauspie CELP Codec (0x1101)
            0x1102	Lernout & Hauspie SBC Codec (0x1102)
            0x1103	Lernout & Hauspie SBC Codec (0x1103)
            0x1104	Lernout & Hauspie SBC Codec (0x1104)
            0x1400	Norris
            0x1401	AT&T ISIAudio
            0x1500	Soundspace Music Compression
            0x181C	VoxWare RT24 Speech
            0x1FC4	NCT Soft ALF2CD (www.nctsoft.com)
            0x2000	Dolby AC3
            0x2001	Dolby DTS
            0x2002	WAVE_FORMAT_14_4
            0x2003	WAVE_FORMAT_28_8
            0x2004	WAVE_FORMAT_COOK
            0x2005	WAVE_FORMAT_DNET
            0x674F	Ogg Vorbis 1
            0x6750	Ogg Vorbis 2
            0x6751	Ogg Vorbis 3
            0x676F	Ogg Vorbis 1+
            0x6770	Ogg Vorbis 2+
            0x6771	Ogg Vorbis 3+
            0x7A21	GSM-AMR (CBR, no SID)
            0x7A22	GSM-AMR (VBR, including SID)
            0xFFFE	WAVE_FORMAT_EXTENSIBLE
            0xFFFF	WAVE_FORMAT_DEVELOPMENT

        */

        return Helper::EmbeddedLookup('0x'.str_pad(strtoupper(dechex($wFormatTag)), 4, '0', STR_PAD_LEFT), $begin, __LINE__, __FILE__, 'riff-wFormatTag');
    }

    /**
     * @param  type $fourcc
     *
     * @return type
     */
    public static function RIFFfourccLookup($fourcc)
    {
        $begin = __LINE__;

        /* This is not a comment!

            swot	http://developer.apple.com/qa/snd/snd07.html
            ____	No Codec (____)
            _BIT	BI_BITFIELDS (Raw RGB)
            _JPG	JPEG compressed
            _PNG	PNG compressed W3C/ISO/IEC (RFC-2083)
            _RAW	Full Frames (Uncompressed)
            _RGB	Raw RGB Bitmap
            _RL4	RLE 4bpp RGB
            _RL8	RLE 8bpp RGB
            3IV1	3ivx MPEG-4 v1
            3IV2	3ivx MPEG-4 v2
            3IVX	3ivx MPEG-4
            AASC	Autodesk Animator
            ABYR	Kensington ?ABYR?
            AEMI	Array Microsystems VideoONE MPEG1-I Capture
            AFLC	Autodesk Animator FLC
            AFLI	Autodesk Animator FLI
            AMPG	Array Microsystems VideoONE MPEG
            ANIM	Intel RDX (ANIM)
            AP41	AngelPotion Definitive
            ASV1	Asus Video v1
            ASV2	Asus Video v2
            ASVX	Asus Video 2.0 (audio)
            AUR2	AuraVision Aura 2 Codec - YUV 4:2:2
            AURA	AuraVision Aura 1 Codec - YUV 4:1:1
            AVDJ	Independent JPEG Group\'s codec (AVDJ)
            AVRN	Independent JPEG Group\'s codec (AVRN)
            AYUV	4:4:4 YUV (AYUV)
            AZPR	Quicktime Apple Video (AZPR)
            BGR 	Raw RGB32
            BLZ0	Blizzard DivX MPEG-4
            BTVC	Conexant Composite Video
            BINK	RAD Game Tools Bink Video
            BT20	Conexant Prosumer Video
            BTCV	Conexant Composite Video Codec
            BW10	Data Translation Broadway MPEG Capture
            CC12	Intel YUV12
            CDVC	Canopus DV
            CFCC	Digital Processing Systems DPS Perception
            CGDI	Microsoft Office 97 Camcorder Video
            CHAM	Winnov Caviara Champagne
            CJPG	Creative WebCam JPEG
            CLJR	Cirrus Logic YUV 4:1:1
            CMYK	Common Data Format in Printing (Colorgraph)
            CPLA	Weitek 4:2:0 YUV Planar
            CRAM	Microsoft Video 1 (CRAM)
            cvid	Radius Cinepak
            CVID	Radius Cinepak
            CWLT	Microsoft Color WLT DIB
            CYUV	Creative Labs YUV
            CYUY	ATI YUV
            D261	H.261
            D263	H.263
            DIB 	Device Independent Bitmap
            DIV1	FFmpeg OpenDivX
            DIV2	Microsoft MPEG-4 v1/v2
            DIV3	DivX ;-) MPEG-4 v3.x Low-Motion
            DIV4	DivX ;-) MPEG-4 v3.x Fast-Motion
            DIV5	DivX MPEG-4 v5.x
            DIV6	DivX ;-) (MS MPEG-4 v3.x)
            DIVX	DivX MPEG-4 v4 (OpenDivX / Project Mayo)
            divx	DivX MPEG-4
            DMB1	Matrox Rainbow Runner hardware MJPEG
            DMB2	Paradigm MJPEG
            DSVD	?DSVD?
            DUCK	Duck TrueMotion 1.0
            DPS0	DPS/Leitch Reality Motion JPEG
            DPSC	DPS/Leitch PAR Motion JPEG
            DV25	Matrox DVCPRO codec
            DV50	Matrox DVCPRO50 codec
            DVC 	IEC 61834 and SMPTE 314M (DVC/DV Video)
            DVCP	IEC 61834 and SMPTE 314M (DVC/DV Video)
            DVHD	IEC Standard DV 1125 lines @ 30fps / 1250 lines @ 25fps
            DVMA	Darim Vision DVMPEG (dummy for MPEG compressor) (www.darvision.com)
            DVSL	IEC Standard DV compressed in SD (SDL)
            DVAN	?DVAN?
            DVE2	InSoft DVE-2 Videoconferencing
            dvsd	IEC 61834 and SMPTE 314M DVC/DV Video
            DVSD	IEC 61834 and SMPTE 314M DVC/DV Video
            DVX1	Lucent DVX1000SP Video Decoder
            DVX2	Lucent DVX2000S Video Decoder
            DVX3	Lucent DVX3000S Video Decoder
            DX50	DivX v5
            DXT1	Microsoft DirectX Compressed Texture (DXT1)
            DXT2	Microsoft DirectX Compressed Texture (DXT2)
            DXT3	Microsoft DirectX Compressed Texture (DXT3)
            DXT4	Microsoft DirectX Compressed Texture (DXT4)
            DXT5	Microsoft DirectX Compressed Texture (DXT5)
            DXTC	Microsoft DirectX Compressed Texture (DXTC)
            DXTn	Microsoft DirectX Compressed Texture (DXTn)
            EM2V	Etymonix MPEG-2 I-frame (www.etymonix.com)
            EKQ0	Elsa ?EKQ0?
            ELK0	Elsa ?ELK0?
            ESCP	Eidos Escape
            ETV1	eTreppid Video ETV1
            ETV2	eTreppid Video ETV2
            ETVC	eTreppid Video ETVC
            FLIC	Autodesk FLI/FLC Animation
            FLV1	Sorenson Spark
            FLV4	On2 TrueMotion VP6
            FRWT	Darim Vision Forward Motion JPEG (www.darvision.com)
            FRWU	Darim Vision Forward Uncompressed (www.darvision.com)
            FLJP	D-Vision Field Encoded Motion JPEG
            FPS1	FRAPS v1
            FRWA	SoftLab-Nsk Forward Motion JPEG w/ alpha channel
            FRWD	SoftLab-Nsk Forward Motion JPEG
            FVF1	Iterated Systems Fractal Video Frame
            GLZW	Motion LZW (gabest@freemail.hu)
            GPEG	Motion JPEG (gabest@freemail.hu)
            GWLT	Microsoft Greyscale WLT DIB
            H260	Intel ITU H.260 Videoconferencing
            H261	Intel ITU H.261 Videoconferencing
            H262	Intel ITU H.262 Videoconferencing
            H263	Intel ITU H.263 Videoconferencing
            H264	Intel ITU H.264 Videoconferencing
            H265	Intel ITU H.265 Videoconferencing
            H266	Intel ITU H.266 Videoconferencing
            H267	Intel ITU H.267 Videoconferencing
            H268	Intel ITU H.268 Videoconferencing
            H269	Intel ITU H.269 Videoconferencing
            HFYU	Huffman Lossless Codec
            HMCR	Rendition Motion Compensation Format (HMCR)
            HMRR	Rendition Motion Compensation Format (HMRR)
            I263	FFmpeg I263 decoder
            IF09	Indeo YVU9 ("YVU9 with additional delta-frame info after the U plane")
            IUYV	Interlaced version of UYVY (www.leadtools.com)
            IY41	Interlaced version of Y41P (www.leadtools.com)
            IYU1	12 bit format used in mode 2 of the IEEE 1394 Digital Camera 1.04 spec    IEEE standard
            IYU2	24 bit format used in mode 2 of the IEEE 1394 Digital Camera 1.04 spec    IEEE standard
            IYUV	Planar YUV format (8-bpp Y plane, followed by 8-bpp 2×2 U and V planes)
            i263	Intel ITU H.263 Videoconferencing (i263)
            I420	Intel Indeo 4
            IAN 	Intel Indeo 4 (RDX)
            ICLB	InSoft CellB Videoconferencing
            IGOR	Power DVD
            IJPG	Intergraph JPEG
            ILVC	Intel Layered Video
            ILVR	ITU-T H.263+
            IPDV	I-O Data Device Giga AVI DV Codec
            IR21	Intel Indeo 2.1
            IRAW	Intel YUV Uncompressed
            IV30	Intel Indeo 3.0
            IV31	Intel Indeo 3.1
            IV32	Ligos Indeo 3.2
            IV33	Ligos Indeo 3.3
            IV34	Ligos Indeo 3.4
            IV35	Ligos Indeo 3.5
            IV36	Ligos Indeo 3.6
            IV37	Ligos Indeo 3.7
            IV38	Ligos Indeo 3.8
            IV39	Ligos Indeo 3.9
            IV40	Ligos Indeo Interactive 4.0
            IV41	Ligos Indeo Interactive 4.1
            IV42	Ligos Indeo Interactive 4.2
            IV43	Ligos Indeo Interactive 4.3
            IV44	Ligos Indeo Interactive 4.4
            IV45	Ligos Indeo Interactive 4.5
            IV46	Ligos Indeo Interactive 4.6
            IV47	Ligos Indeo Interactive 4.7
            IV48	Ligos Indeo Interactive 4.8
            IV49	Ligos Indeo Interactive 4.9
            IV50	Ligos Indeo Interactive 5.0
            JBYR	Kensington ?JBYR?
            JPEG	Still Image JPEG DIB
            JPGL	Pegasus Lossless Motion JPEG
            KMVC	Team17 Software Karl Morton\'s Video Codec
            LSVM	Vianet Lighting Strike Vmail (Streaming) (www.vianet.com)
            LEAD	LEAD Video Codec
            Ljpg	LEAD MJPEG Codec
            MDVD	Alex MicroDVD Video (hacked MS MPEG-4) (www.tiasoft.de)
            MJPA	Morgan Motion JPEG (MJPA) (www.morgan-multimedia.com)
            MJPB	Morgan Motion JPEG (MJPB) (www.morgan-multimedia.com)
            MMES	Matrox MPEG-2 I-frame
            MP2v	Microsoft S-Mpeg 4 version 1 (MP2v)
            MP42	Microsoft S-Mpeg 4 version 2 (MP42)
            MP43	Microsoft S-Mpeg 4 version 3 (MP43)
            MP4S	Microsoft S-Mpeg 4 version 3 (MP4S)
            MP4V	FFmpeg MPEG-4
            MPG1	FFmpeg MPEG 1/2
            MPG2	FFmpeg MPEG 1/2
            MPG3	FFmpeg DivX ;-) (MS MPEG-4 v3)
            MPG4	Microsoft MPEG-4
            MPGI	Sigma Designs MPEG
            MPNG	PNG images decoder
            MSS1	Microsoft Windows Screen Video
            MSZH	LCL (Lossless Codec Library) (www.geocities.co.jp/Playtown-Denei/2837/LRC.htm)
            M261	Microsoft H.261
            M263	Microsoft H.263
            M4S2	Microsoft Fully Compliant MPEG-4 v2 simple profile (M4S2)
            m4s2	Microsoft Fully Compliant MPEG-4 v2 simple profile (m4s2)
            MC12	ATI Motion Compensation Format (MC12)
            MCAM	ATI Motion Compensation Format (MCAM)
            MJ2C	Morgan Multimedia Motion JPEG2000
            mJPG	IBM Motion JPEG w/ Huffman Tables
            MJPG	Microsoft Motion JPEG DIB
            MP42	Microsoft MPEG-4 (low-motion)
            MP43	Microsoft MPEG-4 (fast-motion)
            MP4S	Microsoft MPEG-4 (MP4S)
            mp4s	Microsoft MPEG-4 (mp4s)
            MPEG	Chromatic Research MPEG-1 Video I-Frame
            MPG4	Microsoft MPEG-4 Video High Speed Compressor
            MPGI	Sigma Designs MPEG
            MRCA	FAST Multimedia Martin Regen Codec
            MRLE	Microsoft Run Length Encoding
            MSVC	Microsoft Video 1
            MTX1	Matrox ?MTX1?
            MTX2	Matrox ?MTX2?
            MTX3	Matrox ?MTX3?
            MTX4	Matrox ?MTX4?
            MTX5	Matrox ?MTX5?
            MTX6	Matrox ?MTX6?
            MTX7	Matrox ?MTX7?
            MTX8	Matrox ?MTX8?
            MTX9	Matrox ?MTX9?
            MV12	Motion Pixels Codec (old)
            MWV1	Aware Motion Wavelets
            nAVI	SMR Codec (hack of Microsoft MPEG-4) (IRC #shadowrealm)
            NT00	NewTek LightWave HDTV YUV w/ Alpha (www.newtek.com)
            NUV1	NuppelVideo
            NTN1	Nogatech Video Compression 1
            NVS0	nVidia GeForce Texture (NVS0)
            NVS1	nVidia GeForce Texture (NVS1)
            NVS2	nVidia GeForce Texture (NVS2)
            NVS3	nVidia GeForce Texture (NVS3)
            NVS4	nVidia GeForce Texture (NVS4)
            NVS5	nVidia GeForce Texture (NVS5)
            NVT0	nVidia GeForce Texture (NVT0)
            NVT1	nVidia GeForce Texture (NVT1)
            NVT2	nVidia GeForce Texture (NVT2)
            NVT3	nVidia GeForce Texture (NVT3)
            NVT4	nVidia GeForce Texture (NVT4)
            NVT5	nVidia GeForce Texture (NVT5)
            PIXL	MiroXL, Pinnacle PCTV
            PDVC	I-O Data Device Digital Video Capture DV codec
            PGVV	Radius Video Vision
            PHMO	IBM Photomotion
            PIM1	MPEG Realtime (Pinnacle Cards)
            PIM2	Pegasus Imaging ?PIM2?
            PIMJ	Pegasus Imaging Lossless JPEG
            PVEZ	Horizons Technology PowerEZ
            PVMM	PacketVideo Corporation MPEG-4
            PVW2	Pegasus Imaging Wavelet Compression
            Q1.0	Q-Team\'s QPEG 1.0 (www.q-team.de)
            Q1.1	Q-Team\'s QPEG 1.1 (www.q-team.de)
            QPEG	Q-Team QPEG 1.0
            qpeq	Q-Team QPEG 1.1
            RGB 	Raw BGR32
            RGBA	Raw RGB w/ Alpha
            RMP4	REALmagic MPEG-4 (unauthorized XVID copy) (www.sigmadesigns.com)
            ROQV	Id RoQ File Video Decoder
            RPZA	Quicktime Apple Video (RPZA)
            RUD0	Rududu video codec (http://rududu.ifrance.com/rududu/)
            RV10	RealVideo 1.0 (aka RealVideo 5.0)
            RV13	RealVideo 1.0 (RV13)
            RV20	RealVideo G2
            RV30	RealVideo 8
            RV40	RealVideo 9
            RGBT	Raw RGB w/ Transparency
            RLE 	Microsoft Run Length Encoder
            RLE4	Run Length Encoded (4bpp, 16-color)
            RLE8	Run Length Encoded (8bpp, 256-color)
            RT21	Intel Indeo RealTime Video 2.1
            rv20	RealVideo G2
            rv30	RealVideo 8
            RVX 	Intel RDX (RVX )
            SMC 	Apple Graphics (SMC )
            SP54	Logitech Sunplus Sp54 Codec for Mustek GSmart Mini 2
            SPIG	Radius Spigot
            SVQ3	Sorenson Video 3 (Apple Quicktime 5)
            s422	Tekram VideoCap C210 YUV 4:2:2
            SDCC	Sun Communication Digital Camera Codec
            SFMC	CrystalNet Surface Fitting Method
            SMSC	Radius SMSC
            SMSD	Radius SMSD
            smsv	WorldConnect Wavelet Video
            SPIG	Radius Spigot
            SPLC	Splash Studios ACM Audio Codec (www.splashstudios.net)
            SQZ2	Microsoft VXTreme Video Codec V2
            STVA	ST Microelectronics CMOS Imager Data (Bayer)
            STVB	ST Microelectronics CMOS Imager Data (Nudged Bayer)
            STVC	ST Microelectronics CMOS Imager Data (Bunched)
            STVX	ST Microelectronics CMOS Imager Data (Extended CODEC Data Format)
            STVY	ST Microelectronics CMOS Imager Data (Extended CODEC Data Format with Correction Data)
            SV10	Sorenson Video R1
            SVQ1	Sorenson Video
            T420	Toshiba YUV 4:2:0
            TM2A	Duck TrueMotion Archiver 2.0 (www.duck.com)
            TVJP	Pinnacle/Truevision Targa 2000 board (TVJP)
            TVMJ	Pinnacle/Truevision Targa 2000 board (TVMJ)
            TY0N	Tecomac Low-Bit Rate Codec (www.tecomac.com)
            TY2C	Trident Decompression Driver
            TLMS	TeraLogic Motion Intraframe Codec (TLMS)
            TLST	TeraLogic Motion Intraframe Codec (TLST)
            TM20	Duck TrueMotion 2.0
            TM2X	Duck TrueMotion 2X
            TMIC	TeraLogic Motion Intraframe Codec (TMIC)
            TMOT	Horizons Technology TrueMotion S
            tmot	Horizons TrueMotion Video Compression
            TR20	Duck TrueMotion RealTime 2.0
            TSCC	TechSmith Screen Capture Codec
            TV10	Tecomac Low-Bit Rate Codec
            TY2N	Trident ?TY2N?
            U263	UB Video H.263/H.263+/H.263++ Decoder
            UMP4	UB Video MPEG 4 (www.ubvideo.com)
            UYNV	Nvidia UYVY packed 4:2:2
            UYVP	Evans & Sutherland YCbCr 4:2:2 extended precision
            UCOD	eMajix.com ClearVideo
            ULTI	IBM Ultimotion
            UYVY	UYVY packed 4:2:2
            V261	Lucent VX2000S
            VIFP	VFAPI Reader Codec (www.yks.ne.jp/~hori/)
            VIV1	FFmpeg H263+ decoder
            VIV2	Vivo H.263
            VQC2	Vector-quantised codec 2 (research) http://eprints.ecs.soton.ac.uk/archive/00001310/01/VTC97-js.pdf)
            VTLP	Alaris VideoGramPiX
            VYU9	ATI YUV (VYU9)
            VYUY	ATI YUV (VYUY)
            V261	Lucent VX2000S
            V422	Vitec Multimedia 24-bit YUV 4:2:2 Format
            V655	Vitec Multimedia 16-bit YUV 4:2:2 Format
            VCR1	ATI Video Codec 1
            VCR2	ATI Video Codec 2
            VCR3	ATI VCR 3.0
            VCR4	ATI VCR 4.0
            VCR5	ATI VCR 5.0
            VCR6	ATI VCR 6.0
            VCR7	ATI VCR 7.0
            VCR8	ATI VCR 8.0
            VCR9	ATI VCR 9.0
            VDCT	Vitec Multimedia Video Maker Pro DIB
            VDOM	VDOnet VDOWave
            VDOW	VDOnet VDOLive (H.263)
            VDTZ	Darim Vison VideoTizer YUV
            VGPX	Alaris VideoGramPiX
            VIDS	Vitec Multimedia YUV 4:2:2 CCIR 601 for V422
            VIVO	Vivo H.263 v2.00
            vivo	Vivo H.263
            VIXL	Miro/Pinnacle Video XL
            VLV1	VideoLogic/PURE Digital Videologic Capture
            VP30	On2 VP3.0
            VP31	On2 VP3.1
            VP6F	On2 TrueMotion VP6
            VX1K	Lucent VX1000S Video Codec
            VX2K	Lucent VX2000S Video Codec
            VXSP	Lucent VX1000SP Video Codec
            WBVC	Winbond W9960
            WHAM	Microsoft Video 1 (WHAM)
            WINX	Winnov Software Compression
            WJPG	AverMedia Winbond JPEG
            WMV1	Windows Media Video V7
            WMV2	Windows Media Video V8
            WMV3	Windows Media Video V9
            WNV1	Winnov Hardware Compression
            XYZP	Extended PAL format XYZ palette (www.riff.org)
            x263	Xirlink H.263
            XLV0	NetXL Video Decoder
            XMPG	Xing MPEG (I-Frame only)
            XVID	XviD MPEG-4 (www.xvid.org)
            XXAN	?XXAN?
            YU92	Intel YUV (YU92)
            YUNV	Nvidia Uncompressed YUV 4:2:2
            YUVP	Extended PAL format YUV palette (www.riff.org)
            Y211	YUV 2:1:1 Packed
            Y411	YUV 4:1:1 Packed
            Y41B	Weitek YUV 4:1:1 Planar
            Y41P	Brooktree PC1 YUV 4:1:1 Packed
            Y41T	Brooktree PC1 YUV 4:1:1 with transparency
            Y42B	Weitek YUV 4:2:2 Planar
            Y42T	Brooktree UYUV 4:2:2 with transparency
            Y422	ADS Technologies Copy of UYVY used in Pyro WebCam firewire camera
            Y800	Simple, single Y plane for monochrome images
            Y8  	Grayscale video
            YC12	Intel YUV 12 codec
            YUV8	Winnov Caviar YUV8
            YUV9	Intel YUV9
            YUY2	Uncompressed YUV 4:2:2
            YUYV	Canopus YUV
            YV12	YVU12 Planar
            YVU9	Intel YVU9 Planar (8-bpp Y plane, followed by 8-bpp 4x4 U and V planes)
            YVYU	YVYU 4:2:2 Packed
            ZLIB	Lossless Codec Library zlib compression (www.geocities.co.jp/Playtown-Denei/2837/LRC.htm)
            ZPEG	Metheus Video Zipper

        */

        return Helper::EmbeddedLookup($fourcc, $begin, __LINE__, __FILE__, 'riff-fourcc');
    }

    /**
     * @param  type $byteword
     * @param  type $signed
     *
     * @return type
     */
    public function EitherEndian2Int($byteword, $signed = false)
    {
        if ($this->getid3->info['fileformat'] == 'riff') {
            return Helper::LittleEndian2Int($byteword, $signed);
        }

        return Helper::BigEndian2Int($byteword, false, $signed);
    }
}
